PREMIUM QULAITY OF HP GENUINE BLACK TONER CARTRIDGES YIELDING 6,000 PAGES. COMPATIBLE PRINTERS (IF ANY): HP SMART TANK 355,HP SMART TANK 450,HP SMART TANK 455,HP SMART TANK PLUS 551,HP SMART TANK PLUS 555,HP SMART TANK PLUS 558,HP SMART TANK PLUS 559,HP SMART TANK PLUS 571,HP SMART TANK PLUS 655,HP SMART TANK PLUS 658