LCL Compatible Toner Cartridge Replacement for HP 37A CF237A M607n M607dn M608x M609dn MFP M631 M632 M633 (1-Pack Black)Page yield: 11,000 Pages at 5% Coverage (Letter A4) Easy to install; High capacity; Long term supplies. Condition: Our compatible cartridges from ISO 9001 14001; STMC; CE; ROHS Certified factory. 100% satisfaction guarantee: 24 month warranty and 36 month shelf life. ; If you have any problem, please click our store name"StarTech Office Supplies ",then click "Ask a question" to contact us For use in the following: HP LaserJet Enterprise M607n M607dn