Renewable Toner Compatible Toner Cartridge High Yield Replacement HP 61X C8061X for use in HP LaserJet 4100 LOW COST, HIGH VALUE. RT replacement for HP 61X toner. Printing cost is as low as .005 cents per page, up to 60% less than HP C8061X original toner cartridges. QTY: 1 (1 Black) RT Compatible HP 61X toner cartridge OEM #: HP C8061X / HP 61X | Yield: 10,000 pages based on 5% coverage Compatible with HP LaserJet Printers: 4100, 4100mfp, 4100dtn, 4100n, 4100tn LIFETIME WARRANTY. We honor our warranty regardless of purchase date, even if the Amazon return window has closed