SPACE TEC RETRACTABLE PENSpace Tec Retractable Pen with Black Ink, Medium Point and Black Rubber Coated.
- Cartridge is sealed & pressurized at nealy 35 pounds per square inch
- Tungsten carbide ball
- Writes from -30 to +250 degrees F
- On wet surfaces
- On photographs
- Write through grease
- Underwater
- At any angle
- Upside down