This premium compatible HP C4191A #91A Toner Cartridge (BLACK DRUM UNIT SEPARATE) is produced in a ISO 9002 controlled production facility using the industries finest quality toner and highest grade OEM equivalent laser toner components. It is fitted with a brand new drum, wiper blades and rollers, resulting in superb quality high contrast pin-sharp prints and excellent page yields. Not all compatible toner cartridges are created equal, most others are just low cost, cheap toner Drill & Fills.

Printers Hewlett Packard: HP Color LaserJet 4500, 4500DN, 4500N, 4550, 4550N, 4550DN, 4550HDN. (May also works with some other printer brands)