Page Yield*: 13000 pages Compatible with HP 51X Black toner (per cartridge) *at 5% coverage (ISO/IEC standard) Package Contents: 1 x HP 51X Black compatible toner cartridge Q7551X Compatible with LaserJet3000, M3027x MFP, M3035xs MFP, P3005d, P3005, P3005dn, P3005x Product name: HP 51X 51-X 51 X Black Compatible Toner Cartridge replacement for HP 51 51A 51X (Q7551X) Professional compatible replacements manufactured by LD Products. HP is a registered trademark of HP and is not affiliated with and does not endorse LD Products.