There is no substitute refill for Fisher Space Pens The Fisher Pressurized Ballpoint Refills are the only ones that will work in your Fisher Space Pen. Black and blue ink colors available in fine, medium and broad points. Red ink color available in fine and medium point. Green, purple, turquoise, brown and burgundy ink colors available in medium point.
- Overall Size - 3 1/2 in. x 3/16 in. (76mm x 6mm)
- Weight - 5 g