Medium point black ink refill for Fisher Space Pen. - Model Name: Fisher Space Pen Refill - Ink Color: Black - Point Type: Medium Point - Compatibility: Fisher Space Pens and Parker style refills - Made in: USA Purchased a long time ago at the Kennedy Space Center. This is a pressurized refill for a pen that can write in space, used by American and Russian astronauts. It is unopened and unused, but please understand that it was purchased a long time ago. Thank you for looking.