Buy the HP 78A (CE278A) black toner cartridge with 100% confidence! Low Prices and Large Selection on Quality Products. Find everyday low prices on the HP 78A (CE278A) genuine OEM toner cartridge from a large selection of printer cartridges. Easy to Use and Professional Service. Find all the supported laser printers for the HP 78A (CE278A) toner cartridge in the "Supported Models" section. Return Policy : Manufacturer. About the HP 78A (CE278A) black toner cartridge: HP 78A (CE278A) Type: Genuine OEM A HP 78A (CE278A) genuine OEM means that it is produced by the same company that makes your printer. Genuine OEM toner cartridges typically command a premium price versus their compatible and remanufactured counterparts, but have been fully certified by their original manufacturer for 100% compatibility and performance with their printers. HP 78A (CE278A) Yield: 2100 A 2100 yield for the HP 78A (CE278A) means that at 5% coverage (5% of a page is printed on), this toner cartridge will yield ~2100 printed pages.