PREMIUM QULAITY OF HP GENUINE BLACK TONER CARTRIDGES YIELDING 480 PAGES. COMPATIBLE PRINTERS (IF ANY): HP DESKJET 1000,HP DESKJET 1050,HP DESKJET 2000,HP DESKJET 2050,HP DESKJET 2510,HP DESKJET 3000,HP DESKJET 3050,HP ENVY 4500,HP DESKJET 1500,HP DESKJET 1510,HP OFFICEJET 4630,HP OFFICEJET 2620,HP DESKJET 2540,HP ENVY 5530,HP DESKJET 1010,HP ENVY 4504