Fisher(TM), Refill, Fits Fisher Space Pens, Blue Ink, Medium Point, #SPR1, #11311, Sold Individually by Fisher Space Pens

Description

Stronger beveled ball socket rim is stronger.;Less easily damaged. Writes smoothly at lower angles.;Writes upside down, under water, or in any weather condition.;Writes over grease and on photographs.;Used on all manned space flights.