Fisher Universal Ballpoint Pen Refill, Medium Point, Black Ink (SPR4)

Medium Point, Black Ink, Pressurized Space Pen Refill. Fisher Space Pen’s Sealed Pressurized Ink Cartridge.

• Medium point, black ink
• Fisher Space Pen Ink Refills write upside down, under water, in extreme temperatures (-30 to 250 degrees) and three times longer than the average pen
• Fisher Space Pen is the only NASA approved pen and have been on all manned space flights
• Made in the USA
• GUARANTEE If you are not satisfied with this Fisher Space Pen product, return it to us for repair or replacement
• Stainless steel, precision-machined socket prevents leaks and oozing, yet delivers instant uniform ink flow
• Each