The Fisher SPR4 Medium Point Space Pen Pressurized Refill is the standard replacement cartridge for most Fisher Space pens. The write-out for this cartridge is 15,000 feet, 3.5 times more than typical ball point pen refills. Made in the USA.
- Pressurized cartridge
- 15,000 feet write out
- Writes at any angle
- Writes underwater
- Writes in extreme temps -30 F - +250 F degrees
- Standard 3.5 inch pressurized refill
- Black, medium point
- Made in the USA
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