Laser Tek Services Compatible Toner Cartridge for Canon 128 CRG-128 3500B001AA ImageClass D530 D550 MF4412 MF4420n Page Yield: 2,100 @ 5% coverage per page The product is guaranteed to meet or exceed your expectations, offering premium print quality at low prices! The compatible toner cartridge will produce the same amount of page yield as an OEM cartridge would. Laser Tek Services offers excellent customer service; including email and phone support. Full 1 year warranty against manufacturer defects and print quality.