Seller: belote (346,053) 99.3%, Location: Encino, California, Ships to: Worldwide, Item: 333196793837 Fisher Space Pen Since 1953 The Fisher Space Pen (also known as the Zero Gravity Pen), marketed by Fisher Space Pen Co., is the original pen that uses pressurized ink cartridges and will write in zero gravity, upside down, underwater, over wet and greasy paper, at any angle, and in extreme temperature ranges. These pens can write at altitudes up to 12,500 feet (3810 m). The ink is forced out by compressed air at a pressure of nearly 35 pounds per square inch (240 kPa). Operating temperatures range from -30 to 250 degrees Fahrenheit (-35 to 120 degrees Celsius). These pens have an estimated shelf life of 100 years. FISHER PRESSURIZED INK REFILLS Model: SPR4 Description: Black Ink Medium Point Space Pen Pressurized Refill Condition: Brand New Retail Price: $5.00 Color: Black We also have a full line of original Fisher Space pen Refills and Accessories Just Click Here! For our full line of Fisher Space Pens To view our eBay store Created by eBay Blackthorne ver. 188.8.131.52 Bonus: PayPal buyers get complimentary access to belote's weekly newsletter. Condition: New, Brand: FISHER SPACE PEN COMPANY, Age: New, Featured Refinements: Space Pen, California Prop 65 Warning: This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm.