Fisher Space Pens 400CL Chrome Bullet with Clip. Made in the USA.Cartridge is sealed & pressurized at nealy 35 pounds per square inchTungsten carbide ballWrites from -30 to +250 degrees FOn wet surfacesOn photographsWrite through greaseUnderwaterAt any angleUpside down. eCop! Police Supply thanks you! MFG MPN: 400CL UPC: 747609841343 MPN: FSP400CL