This is a compatible or remanufactured Lexmark 51B1000 toner cartridge guaranteed to perform with Lexmark Laser Printers. It replaces the genuine (OEM) Lexmark 51B1000 toner cartridge. This toner cartridge is made with top quality components and new toner to give you the highest quality printouts every time. This compatible or remanufactured for Lexmark 51B1000 toner cartridge is specially engineered to meet or exceed the highest standards of quality, reliability and page yields. Although this cartridge is not made or endorsed by Lexmark, it offers customers an economical alternative to expensive OEM Lexmark 51B1000 cartridges and comes with our satisfaction guarantee. This toner cartridge is compatible with MS317, 417, 517, 617 and many more