Fisher Space Pen Ballpoint Refill, pressurised, blue, B

The original pressurised refill for the Fisher Space Pen. Available in Medium (point size 0.4 mm) or Broad (point size 0.5 mm). The sealed, pressurised refill provides a reliable and even ink flow in temperatures ranging from -34 °C to +121 °C. It even works under water, in zero gravity, upside down, at any angle and on practically all surfaces.