HP 678 Tri-color Ink Cartridge Colour:Tri-Color   In case of HP inks, the coverage lasts until the HP ink is depleted or the warranty ends date has been reached, whichever occurs first. Each HP ink cartridge, printhead and related supply is warranted to be free from defects in materials and workmanship during the period of the warranty. This warranty pertains to any HP ink cartridge when used in its designated hp or authorised original equipment manufacturer (oem) printing device.