PREMIUM QULAITY OF HP GENUINE BLACK TONER CARTRIDGES YIELDING 6,500 PAGES. COMPATIBLE PRINTERS (IF ANY): HP COLOUR LASERJET PRO M452DN,HP COLOUR LASERJET PRO M452DW,HP COLOUR LASERJET PRO M452NW,HP COLOUR LASERJET PRO M477FDW,HP COLOUR LASERJET PRO M477FNW,HP COLOUR LASERJET PRO M377DW