These are compatible Brother LC51 inkjet cartridges guaranteed to perform with Brother inkjet printers. It replaces the genuine (OEM) Brother LC51 ink cartridges. These inkjet cartridges are made with top quality ink to give you the highest quality printouts every time. These compatible Brother LC51 inkjet cartridges are specially engineered to meet or exceed the highest standards of quality, reliability and page yields. Although these cartridge are not made or endorsed by Brother, it offers customers an economical alternative to expensive OEM Brother LC51 cartridges and comes with our satisfaction guarantee.