Fisher Space Pen Refills: Write Anywhere, Anytime

The Fisher Space Pen was originally developed for NASA astronauts.It's a pressurized cartridge that lets you write in zero gravity, underwater, upside down, through grease, and in extreme temperatures ranging from -30°F to +250°F (-34°C to +121°C). 

With its hermetically sealed, pressurized reservoir, the SPR4 ensures smooth ink flow in any situation, so you're never left stranded without the ability to write.

Compatible with The Atomic Bear tactical pens, it's the perfect upgrade to take your writing tool from reliable to extraordinary. Trust the same technology used by astronauts, adventurers, and professionals worldwide. 

Made in the USA 🇺🇸 Compatible with All Atomic Bear Pens - except the MTP-6 (flashlight pen)

How are The Fisher Space pen refills made? A peek into their factory:

Do they Actually Write Underwater?

I asked my neighbour to use their pool, and my daughter filmed with my iPhone (that survived). See for yourself:

How to Choose Your Cartridge

1. Go for the most popular Black / Medium
2. Select your color (black, blue, red)
3. Select the writing line thickness (fine, medium, bold)