This is a compatible Brother TN431BK toner cartridge guaranteed to perform with Brother laser printers. It replaces the genuine (OEM) Brother TN431BK 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 Brother TN431BK 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 Brother, it offers customers an economical alternative to expensive OEM Brother TN431BK cartridges and comes with our satisfaction guarantee.