Fisher Space Pen Refill Ballpoint Medium Nib Blue sharp Made of sturdy steel mesh

Made of sturdy steel mesh

Ideal for securing documents

use anywhere and reusable

Silver shine finish

Fisher Space Pen Refill Ballpoint Medium Nib Blue sharp Made of sturdy steel meshDescriptionSpecificationsShipping 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