Fisher Space Pen SPR1F Pressurized Ballpoint Refill, Fine Point, Blue Ink

Write anywhere, in any conditions, with the Fisher Space Pen SPR1F pressurized ballpoint refill. This fine point refill delivers blue ink that flows in zero gravity, underwater, over grease, and at any angle—from -30°F to +250°F. Engineered with nitrogen-pressurized thixotropic ink and a tungsten carbide ball, it writes three times longer than a standard ballpoint and has a shelf life of 100 years.

Overview

The SPR1F is a PR series refill compatible with all Fisher Space Pen models, including Bullet, Astronaut, and Cap-O-Matic, as well as many other pens that accept PR refills. Its stainless steel body houses a hermetically sealed, pressurized ink cartridge that ensures consistent, skip-free writing performance in extreme environments. Whether you're an astronaut, outdoor enthusiast, or simply demand reliability, this refill delivers.

What stands out

• Pressurized thixotropic ink writes in zero gravity, underwater, over grease, and at any angle
• Extreme temperature range: -30°F to +250°F (-34°C to +121°C)
• Fine point (F) with tungsten carbide ball for smooth, precise lines
• Stainless steel body for durability and corrosion resistance
• Writes up to 12,000 feet (3.6 miles)—three times longer than standard ballpoints
• Ink shelf life of 100 years; water and fade resistant

Technical details

• Product Type: Pen Refill
• Ink Color: Blue
• Point Size: Fine (F)
• Refill Series: PR Series
• Ink Type: Pressurized Thixotropic Ink
• Writing Mechanism: Ballpoint
• Compatibility: Fisher Space Pens (Bullet, Astronaut, Cap-O-Matic) and other pens accepting PR series refills
• Temperature Range: -30°F to +250°F (-34°C to +121°C)
• Quantity Per Pack: 1
• Refill Body Material: Stainless Steel
• Ballpoint Material: Tungsten Carbide
• Ink Lifespan: Estimated 100 years shelf life
• Write Out Length: Approximately 12,000 feet (3.6 miles)
• Water Resistance: Yes
• Fade Resistance: Yes
• Pressure System: Nitrogen Pressurized
• Country of Manufacture: USA

Our verdict

The Fisher Space Pen SPR1F refill is the ultimate choice for those who need writing performance without compromise. Its pressurized ink system and rugged construction make it a dependable companion in any environment, from the office to the extremes of space.