Greencycle 4 PK Compatible Canon 128 Black Toner Cartridge Fits ImageClass D550, MF4420n, MF4450, MF4550, MF4570dn, MF4580dn Type: Premium Compatible Toner Cartridge (Not OEM) Compatible OEM Model: Canon 128 Yield: Toner cartridge up to 2,100 pages at 5% coverage (Letter size Paper) Actual toner yield varies with usage, graphics printed and environmental conditions. Brother Compatible Printer below:L100D530D550MF4412MF4420nMF4450MF4550MF4550d MF4570dnMF4570dwMF4580dnMF4770nMF4880dwMF4890dw. Package Qty: 4 Toner Cartridge