This is an original Brother DR520 Laser Drum Unit manufactured 100% new by Brother. Choose the OEM Brother DR520 Laser Drum Unit for clear, crisp prints every time. When purchasing your OEM DR520 Laser Drum Unit from Rock Bottom Ink (RBI), $1.00 will be donated to charity: water to fund clean water projects for the nearly 1 billion people who do not have access to clean drinking water! Name Brand OEM cartridges are covered by the respective manufacturer's warranty. We do not accept returns for OEM (Original) products, so in the case you receive a defective cartridge please contact the manufacturer.