Renewable Toner Compatible High Yield Toner Cartridge Replacement for HP 55X CE255X Laserjet Enterprise P3010 P3015 P3016 M521 LOW COST, HIGH VALUE. RT replacement for HP 55X toner. Printing cost is as low as .0039 cents per page, up to 60% less than HP CE255X original toner cartridges. QTY: 1 (1-Pack Black) RT Compatible HP 55X | HP CE255X toner cartridge High Yield: 12,500 standard pages at 5% coverage For use in HP LaserJet Enterprise Printers: P3010 P3015 P3015d P3015dn P3015n P3015x P3016 M521dn M521dw M521dwk M525c M525dn M525f MFP LIFETIME WARRANTY: we always honor our warranty, even if the Amazon return window has closed