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Fisher Trekker Space Pen information
List Price: $38.00
Now:  $28.50

Product # 4550

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Fisher Space Pen Pressurized Refills


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Fisher Trekker Space Pen

- 36 customer reviews.

Fisher Trekker Space Pen

How many times have you reached into your flight bag or kneeboard during a flight only to find the ink has dried or the pen no longer working?  This happens even more frequently the higher altitudes that you fly.  The Fisher Space Pen is your solution to always having a working writing instrument during flight and on the ground.

Unlike ordinary ball pens which rely on gravity to feed ink, the replaceable Space Pen cartridge is pressurized. At nearly 35 pounds per square inch, ink is continuously fed to the tungsten carbide ball, allowing the user to write at any angle, even upside down. This advanced technology required Fisher Space Pen Co to develop a new and special ink.

And they did. The new visco-elastic, thixotropic ink, with a consistency similar to that of very thick rubber cement, flows as a result of the shearing action of the rolling ball in its socket. This shearing action liquefies the solid gel thixotropic ink, allowing the pen to write smoothly and dependably on the most surfaces and even underwater.

Evaporation, wasted ink and back leakage are eliminated. The estimated shelf-life of these pens is over 100 years.

  • Writes from -30º to 250º F
  • Writes at any altitude
  • Writes on Wet Surfaces
  • Writes on Photographs
  • Writes Underwater
  • Writes at any angle

Pioneering in technology the new Fisher Trekker Pen can hang upside down forever yet function immediately when needed. Always have a reliable pen available for immediate use. Attach your keys to the Trekker Pen. The Trekker space pen with a key chain attached to the posi-lock cap allows for easy accessibility. The Trekker space pen comes with a carabiner and a break-away lanyard making it easily attachable to a belt loop, back pack, purse, climbing gear, briefcase or anything else that is within your reach. Includes a Fisher PR4 Pressurized Refill, Medium Point, Black Ink.

Available in Silver with Black or all Black.


List Price: $38.00
Now: $28.50

Shipping only $2.95!

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Buy With Confidence!  Purchase today and you can return it in the original condition through Thursday, October 18, 2018!  Our return policy.

Have a question about Fisher Trekker Space Pen?  Ask your question and see previous Q & A about this product.

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Customer Reviews For Fisher Trekker Space Pen:
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Friday, January 27, 2017
Exactly what I expected and then some!
by Arun Pande from Denver CO USA 

Pros: Writes upside down.
Cons: None that I can see.
Review: Wonderful product. I do crossword puzzles and other puzzles lying down and in ink. Other ball pens do not write upside down, only this does. I love it because I don't have to compromise my standard by using a pencil!!!
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Tuesday, July 15, 2014
by Ralph from New York NY USA 
Review: I didn't like that when you take apart there is no place to store the cap.
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Thursday, August 08, 2013
by Kathy from Fresno, CA 
Review: I got this pen for my husband (he is a CFI) and he absolutely loves it. The only problem is that within a couple of months the mechanism on the carabiner broke so he could no longer hook it to his pant loop or clipboard. The pen, itself, is great though.
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Friday, June 21, 2013
by A Customer from Pembroke Pines FL USA 
Review: While I love the pen ,didn't last. It broke in less than a month to been use.
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Monday, June 03, 2013
looks good
by ARNOLD from Dothan AL USA 

Pros: looks good
Cons: too hard to uncap, refil...not for fighter pilots
Review: This pen is only a curiosity for me
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Friday, May 27, 2011
NOT sorry I bought this.
by Traci from Fredericksburg TX USA 

Pros: Compact, Refillable, Easily attachable to lanyards
Cons: Heavier than other compact pens
Review: I LOVE this pen. I wear a lanyard at work all the time and kept trying to find pens to hang from it that didn't stop working after a short time because they always seem to hang point up. This pen is just the right size and the refills are great because they are pressurized and won't "dry up" when they look like they're full of ink.
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Tuesday, January 18, 2011
It's OK...
by Wayne from Galesville MD USA 

Pros: It does write on lots of surfaces.
Cons: It is not comfortable, easy to use or very practical.
Review: It's not what I expected. Its tight fit makes it difficult to get out of the cap, and then it doesn't really fit properly in my had.
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Thursday, January 13, 2011
Great concept
by A Customer from Lovington NM USA 

Pros: So convenient & reliable
Cons: Pen cap does not fit on barrel
Review: Pen is great but wished the cap could fit on barrel after opening.
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Tuesday, January 11, 2011
Performs as promised
by David from Dixon IL USA 

Pros: always works, like lanyard style
Cons: price but works better than a Cross which is also pricey.
Review: I have used the space pen for over 10 years mostly for my Boy Scout activities. The pen always works and for those needing a pen with a neck lanyard it don't get lost. Highly recommend the product. Yes its pricey but you pay for what you get.
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Wednesday, October 06, 2010
Uh oh... review update
by chephy from  

Review: Ooops... only a few days after writing a glowing review I dropped my Space Pen (from only about 4 feet); and while it still functions, it's certainly not what it used to be. Instead of beautiful, smooth writing action I now get weak intermittent ink flow with an occasional small blotch. :-((( It's still possible to write with it, but now it physically pains me because I remember just how GOOD it was before, and how mediocre the writing quality is now. I guess I'll order a replacement cartridge and see if that solves the problem. It's disheartening though to know that such a small disturbance turns this otherwise wonderful pen into a subpar one. :-(
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Sunday, September 26, 2010
Excellent solution!
by chephy from Toronto, Canada 

Pros: solidly built, writes well, perfect solution for someone who misplaces pens
Cons: lack of clip (minor issue)

Before I would always find myself helplessly fishing for a pen, no matter what I did. God knows, I tried hard: I'd stuff every single bag I had with a bunch of pens, but sooner or later would end up with all these pens scattered around somewhere, lost, misplaced and just never in their proper place.

My boyfriend seems to do just fine keeping pens in his pockets (he always has one on him!), but I just knew that I had to have something that attaches to my keychain. The space pen made a world of difference: now I NEVER find myself desperately groping for a pen, whereas before I was doing that CONSTANTLY.  It's one of those little tweaks that cut down big time on frustration and just make life flow a little bit smoother.

I've been using the pen for about six months now and really like it. So, here is a quick breakdown of the features:
-- MAKE and FEEL The pen feels very solid, the cap is tight. The rubber grip is a nice touch. I have not had any issues with the pen coming unscrewed.

-- SIZE I have bigger than average hands for a female (long fingers), and would say that the pen is too small to write novels with, but for brief notes (e.g. logbook entries), which is all I ever use mine for, it's just fine. I wouldn't want the pen to be bigger, because otherwise it would be an annoyance to carry in the pocket. As it is, the pen is small enough to be relatively unobtrusive, but not so small that it is cumbersome to handle.

--ATTACHMENTS I have not used the lanyard, so can't comment on that. The black key ring (that comes with the black tactical version of the Trekker) has had paint chipping off, and it's certainly not black now, but that's not a concern with the silver version of the pen, and not something I personally care about anyway (especially since the paint has NOT been chipping off the pen itself, it's as black and beautiful as on the day I got it). My only complaint is that the pen does not have anything in a way of a clip. So after I pull the keychain out of the pocket and pull the pen off the cap, I have no way to clip the pen to, say, the kneeboard or a pocket. I basically have nowhere to put it other than back into its cap: if I tried to put it down, it would roll off and get lost pretty fast, since it's so small and round. I understand the designers were trying to keep it sleek, but surely a small clip wouldn't get in the way too much. However, in some sense this is not too bad - it forces me to use this pen as a spare and not rely on it exclusively. It also makes sure I can't forget this pen anywhere, clipped to something or other, as I so easily forget others.

--WRITING QUALITY The writing is solid - not too faint and not blotchy. Always writes on first try. Can't comment on how it writes on different surfaces, since I only used it on regular paper.

--OVERALL Excellent buy. Sure, it's pricey for a pen, but you do get real quality for what you pay, so I have no regrets about mine.

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Tuesday, May 26, 2009
great product
by Stan from Bakersfield CA USA 

Review: Easy, convenient, always at hand.
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Friday, May 22, 2009
Not really worth it
by A Customer from OH 

Pros: Size
Cons: Cost, lack of refill as advertised
Review: I own other Fisher space pens, so I knew what to expect with the Trekker. The pen is compact, and I like that. It's easy to use, even with my larger hands. The ink writes on everything I've tried, with two exceptions (metals and glossy photos). The pen comes with a clamshell case, black neck lanyard, black metal carbiner, and a split ring. The package advertises a refill being included, but the Trekker comes with only one ink cartridge (the one already inside it). The retention of the pen in its cap is great; some might call it too tight. If I try to pull the pen out and use it while it's hanging off the neck lanyard, the lanyard's safety will snap before the cap will come off. This happens every time. I didn't have the unscrewing problem some have mentioned. However, I still feel that the price (I paid $22 locally for mine) is a bit high. They could've included a refill or a mail-in coupon, but they didn't. I wouldn't buy this pen again because of the problems listed above, unless the price was lower.
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Thursday, April 23, 2009
Barrel comes unscrewed
by A Customer from California 

Pros: Compact, rugged, cap stays on.
Cons: The two halves of the pen come unscrewed.
Review: Everything is as described but there is a major design flaw. The barrel of the pen easily comes unscrewed from the top, leaving you with the top part of the pen enclosed in the cap hanging from your belt, but the rest is missing. The manufacturer did replace the missing parts for free when this happened the first day my son used the pen, but he has to remember to regularly tighten the two halves to prevent a repeat failure.
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Friday, February 20, 2009
Great pen but major flaw in design
by G from Scotland 

Pros: Great quality ink, always writes, perfect size
Cons: Expensive, bad design causing it to fall apart
Review: Price aside, the only issue with this pen is the top part will unscrew itself off every now and again, if you notice at the time you can screw it back on but if not you will lose parts of the pen (like I did). This pen is just far too expensive to lose which is why I do not recommend it to anyone.
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Thursday, January 29, 2009
by A Customer from bossier city LA USA 
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Monday, January 26, 2009
You won't lose this one!
by Moosehead from Austin TX USA 

Pros: SPACE pen! and TIGHT lid! AND ATTACHMENT device
Cons: can't find any yet! It's been in use for >2 months.
Review: This was EXACTLY what I wanted for myself and my hubby to use in our outdoors activities. Writes at any angle (of course), AND will write on a wet surface, AND we can ATTACH it to our gear with a carabiner or lanyard, AND the cap fits so tightly we don't have to worry about it getting snagged on a bush or vine (like has happened to us with many lesser pens). WE LOVE IT.
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Friday, January 16, 2009
What you see is what you get
by Alan W. from Anchorage AK USA 

Pros: writes upside down as advertised
Cons: does not write on all surfaces
Review: The pen is advertised as being able to write on all surfaces,upside down, under water...etc...It does not write under water or on aluminium, steel surfaces! Better stick with a lead pencil which does write under water, on steel surfaces and upside down!
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Thursday, January 15, 2009
Great pen if you dont let it hang
by Gerard from Omaha NE USA 

Pros: Great quality, ink and construction
Cons: Won't hang togeather as promoted
Review: Pen has excellent ability to lay down a superior line. A bit short for a bigger hand. Pen fell off the cap twice, first time it unscrewed itself. Second time I looked, cap was there, pen wasn't. Don't trust the pen to hang from neck or belt or it will be lost for sure.
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Thursday, January 15, 2009
It's good
by Jerry from Torrance CA USA 

Pros: small size works well
Cons: none
Review: It met my expectations.
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Thursday, January 15, 2009
Just as advertised!
by Dorothy from Yermo CA USA 

Review: This pen also works when the weather is extremely cold. My husband loves it and carries it around his neck when flying on business trips. Next one is for ME!
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Friday, December 12, 2008
I love my Fisher Trekker Space Pen!
by Richard W from Altadena CA USA 

Pros: Very well made, keeps its good looks, never fails to write in any position, convenient to attach to key chain, 100% made in USA.
Cons: None that I have found.
Review: I love my Trekker pen so much that I frequently pull it out of my pocket during a conversation and brag about it. It's hooked to my keys and has kept its good looks from when I first got it from you. More often than not when I need to use it there is no convenient place to write and I have to use a wall or a door to write on. Other pens would lose their ink writing that way but the Fisher Trekker pen always performs-- even upside down! Friends at work have been impressed--- thus my desire to give them away as holiday presents this year
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Sunday, August 03, 2008
Great pen! Worked perfectly in Africa on the bumpiest roads imaginable!

Pros: Worked consistently and kept cover on.
Cons: Seriously cannot find anything!
Review: This pen worked on all airplane rides, and there were many! It worked perfectly on the bumpy roads of Africa when I thought nothing would work! It was always clear, never lumpy and I loved how the cover always stayed on!
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Wednesday, June 25, 2008
by Stan from Bakersfield CA USA 
Review: Excellent, the pen is a little short for writing more that short notes.
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Wednesday, May 28, 2008
Fisher Trekker Space Pen
by Amy from CO USA 

Pros: the lanyard, & being able to use it in adverse weather conditions
Cons: pricey
Review: I purchased this pen to use in the airplane. I thought it would be nice to hang off of something to be in easy reach always. The fact that it can write if the pen is hot or cold is a plus so you dont have to sit & try to get the ink to come down. Also the small size is nice. The lanyard thats attached makes it easy to hang around your neck or off of something in the cockpit.
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Monday, April 14, 2008
Exactly what I was looking for
by Linda from Carmichael CA USA 

Pros: Very handy -writes in all positions
Cons: Sometimes a little hard to separate top from bottom is hands are slippery.
Review: What I really like about this pen is I can carry it around my neck with a small tablet. If I remember something I need to do I can immediately write it down instead of interupting my current activity (which I might not get back to until I remember it again!)  It allows me to concentrate on one thing at a time and reduces stress since I don't have to keep a running blog in my mind of things I still need to do.
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Thursday, February 28, 2008
Do you have a pen? Why, yes I do!
by Goat from Inver Grove Heights, MN USA 

Pros: Short, writes every time, well made
Cons: Short, refills not locally available for me
Review: This is the pen I've been looking for. It's short enough to be unobtrusive. The cap attaches securely enough so the pen can be confidently dangled from a key chain. It writes the first time, every time, even after sitting outside at -20 F. And, of course, it writes upside down. It's not for letter writing, especially if you've got larger hands, but when you just need a flippin' pen, there it is! There's no reason not to attach this thing to your key ring, or whatever else, so it's always with you.
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Tuesday, February 05, 2008
Great pen!
by Jim from Claremore OK USA 

Pros: very handy
Cons: none
Review: I have used Fisher Space Pens in the past but kept dropping them in the plane. They are always short. I bought this one because it hangs around your neck. Just a great feature. Haven't dropped one since.
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Friday, January 18, 2008
Broke when taken out of package! Stay away
by HDW from Tulare CA USA 

Pros: Sounded like a good idea
Cons: Cheaply made, therefore defective
Review: When my husband took the pen out of its plastic package, the pen's back-end plastic cover broke off the pen, making the pen unusable. It was, all in all, a big waste of $20.
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Wednesday, January 16, 2008
Not necessary, but fun
by A Customer from Westford MA USA 

Pros: It's good looking, useful and interesting.
Cons: My nephew found something it couldn't write on, but I don't know what it was.
Review: OK. Neither of my college age nephews NEEDED a pen to operate under all these conditions, but they are stylish, a curiosity and fun. Their mom laid down the law - no writing on the bottom of the pool next summer!
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Thursday, December 13, 2007
The perfect pen for Geocaching.
by Richard from Los Angeles CA USA 

Pros: Easy to retrieve and replace one-handed. Writes in any position, and on wet paper.
Cons: None
Review: Easy to retrieve and replace one-handed. Writes in any position, and on wet paper.
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Thursday, October 25, 2007
Would not buy again
by RF from CA, USA 

Pros: Construction
Cons: Poor ink flow - the whole point!
Review: Compact and nicely made, but doesn't write very well. Thin, weak line...
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Friday, October 19, 2007
Never Hunt for a Pen Again!
by Nikki from Atlanta GA USA 

Pros: Never, ever be without a pen!
Cons: It could stand being a touch longer
Review: Always seem to be looking for a pen? Get this Fisher Trekker Space Pen and as long as you have keys with you, you will always have a pen! I first saw these in "Outside" magazine, bought one for myself, then one for my sister and then one for each of my parents and now I send them out as gifts for friends ;) If you want to give a gift, why not give the recipient something they'll actually use all the time?
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Monday, September 24, 2007
Great Pen
by Thomas from springfield MO USA 

Pros: Uses regular spacePen refills, Cap never lets go
Cons: Everyone trys not to return it--Never lone out
Review: Perfect size, no need to put on cap to make it longer, I have never had it come loose from the cap after 1000s of pulls off my belt loop. next best pen next to there Telescoping Pen. Refills last a long time. Easy to grip rubber on shaft.
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Tuesday, September 04, 2007
I use this Space Pen Every Day!
by Nikki Recob from Atlanta 

Pros: Always with you, writes at any angle etc
Cons: Could be just a tad longer
Review: This Fisher Space Pen is invaluable! If you are always looking for a pen get this Trekker model, put it on your key ring and forgetaboutit!
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Friday, April 27, 2007
Freaking awesome
by Matsaleh from Austin, TX 

Pros: Strength, durability, utility, reliability.
Cons: None
Review: This is the coolest pen ever. Since I got it, it has remained attached to my belt via the included carabiner, a terrific accessory. The construction is excellent, and the pen barrel and cap are strong enough to withstand all kinds of abuse: being twisted when I get into and out of my car, squeezed between my Leatherman sheath (also on my belt) and my Buck folding knive (clipped to my pants pocket), and more. I quickly wore aware the black "Trekker" lettering from the barrel, but the stainless finish barely shows any wear. Also, the cap attaches snugly to the body, and does not show any sign of giving up or weakening. This pen is so cool that I immediately bought two more, one for my wife, and one for my buddy at work. Highly recommended.
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Previous Customer Questions For Fisher Trekker Space Pen:
Ask Your Own Question
On Monday, June 23, 2008 a customer asked:
How long is this pen with the cap off? with the cap on?
A: This pen is 3 7/8" with the cap on, 3 5/8" with the cap off.

On Tuesday, November 27, 2007 a customer asked:
Can you wear this pen around your neck?
A: Sure, you could wear it around your neck.

On Tuesday, November 06, 2007 a customer asked:
Does the Trekker pen on your site come with a free blank ink refill (as it does on Fisher's website? Thank you!
A: Yes, this pen comes with one tube of ink.

Manufacturer Part Numbers: 725B 725 SC725


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