Diplomat's Spacetec range of pens contain gas-pressurised refills which allow them to write in extreme conditions: from 200 deg C to -50 deg C; underwater; upside-down; in zero gravity (always useful!) and onto greasy surfaces. Just like a Fisher Space Pen. There's a wide range of styles, most in metal. Diplomat Spacetec website
Spacetec Pocket Pen - compact bullet pen.
Spacetec Pocket Pink Pen - special edition bullet pen.
Spacetec Zero Gravity Pen
Spacetec Grip Pen - compact and sturdy for hanging on a keyring.
Spacetec Life Pen - chunky metal-body retractable with incised grip design.
