Fisher Space Pen Refill Ballpoint Medium Nib Black mars Can be left uncapped for

Can be left uncapped for at least 12 hours without drying up

SKU: DS02785

Specifications:-

SKU: DS02616

Fisher Space Pen Refill Ballpoint Medium Nib Black mars Can be left uncapped forDescriptionSpecificationsShipping Paul C. Fisher developed the pressurized refill for NASA in 1965. It's still in use today on manned space flights because it performs when other pens fail. The combination of tungsten carbide ball point and thixotropic ink in a hermetically sealed cartridge pressurized at nearly 35 pounds per square inch allows it to write in freezing cold, boiling heat, under water and at any angle even upside down! Pressurized Space