HP DesignJet 772 Light Grey Ink Cartridge (CN634A)HP 772 300 ml Light Gray DesignJet Ink Cartridge Print the vision. Then print it again confident you'll get the same vivid color, the same quality. It's no problem using Original HP supplies and printing materials designed together with the printer. Prints made with Original HP pigment inks achieve over 200 years display permanence on a range of HP creative and specialty media. Built in intelligent technology enables convenient supplies reordering.