PREMIUM QULAITY OF HP GENUINE BLACK TONER CARTRIDGES YIELDING UP TO 1000 PAGES. COMPATIBLE PRINTERS (IF ANY): HP OFFICEJET PRO 8100,HP OFFICEJET PRO 8600 PLUS,HP OFFICEJET PRO 251DW,HP OFFICEJET PRO 8610,HP OFFICEJET PRO 8620,HP OFFICEJET PRO 8630,HP OFFICEJET PRO 276DW