Get the best results from your HP printing system. HP Smart technology and chemically-grown toner formulas in HP 645A LaserJet Toner Cartridges work with your printer to deliver accurate, consistent color and reliable, cost-effective performance.
Consistently accurate color and precise images with HP chemically-grown tonerOptimal print quality with new image mode feature
Cost-effective operation with all-in-one HP toner cartridgesHP Smart technology tunes particle charge for reliable resultsRated A+ for service
Easy to use automatic alerts, on-line ordering with HP Smart printing technology When a color cartridge runs out, continue printing with the black cartridge Easy to use and install with HP Smart printing technology