Fisher Space Pen Ballpoint Pen Refill for Sherpa Ballpoint Adapter
Are you looking to write upside-down, under water, through grease, at 400 degree temperatures, or in …space? Well look no further than the Fisher Space Pen ballpoint refill. Each refill is filled with a special ink blend and then pressurized to ensure there is always ink ready to go at the tip.
This a great option for anyone who needs to use their Sherpa in more unconventional conditions or at odd writing angles.