HP C4129X Compatible High Yield Black Toner Cartridge
HP Compatible COM-C4129X, COMPATIBLE HP 29X Toner Cartridge (HP C4129X). Ultraprecise Print Cartridge for LaserJet 5000  and  5100 Series, maximum-capacity. -  Fits printer models: LaserJet 5100/5100dtn/5100tn/ 5000/5000dn/5000gn/5000n