This is a compatible Brother DR520 drum cartridge guaranteed to perform with Brother laser printers. It replaces the genuine (OEM) Brother DR520 drum cartridge. This drum cartridge is made with top quality components to give you the highest quality printouts every time. This compatible Brother DR520 drum 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 DR520 cartridges and comes with our satisfaction guarantee.