Black Fine Point Universal Space Pen Refill SU4F

The SU Universal Series refills have two break off points to adjust the size to fit a wide range of pens. Simply hold your current refill against the Fisher SU refill and snap it off at the correct length. This refill was originally developed by Paul Fisher in 1953 when ballpoint pens were new and every pen took a different refill.

The SU refills have all the features of the other space pens - the liquid nitrogen pressurised ink chamber which allows you to write at any angle, in extreme heat and cold, through grease and water and will never leak.

Fits Fisher Q4, Fisher Triple Action pens, Autopoint, Chromatic, Mirage, Niji, Sharbo, Zebra, Mont Blanc Mozart, most 2 and 3 colour ballpoint Pens and most multi-action pens. Available in blue, red, and black ink in fine point only.