The use of Brother Genuine replacement toner cartridges like the TN-420 produces sharp, black and white pages with the quality you expect from Brother products. The Brother TN-420 replacement laser black toner cartridge is for use with 16 Brother products. This professional cartridge is intelligently engineered to work in seamless unison without compromising the quality of the print. The Brother Genuine TN-420 replacement black toner cartridge can print approximately 1,200 pages. Brother is dedicated to being environmentally responsible and offers disposal programs for properly discarding its cartridges.