4inkjets.com's compatible Brother DR420 laser drum unit is guaranteed to perform with your Brother laser printer. It replaces the original Brother DR420 laser drum unit. The compatible replacement DR420 laser toner cartridges and supplies (also known as generic) are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM (Original Equipment Manufacturer) standards for the DR420 and offer high-quality printing results. Containing new drum and other rollers, they are an economical alternative to expensive OEM DR420 Brother laser drum units and supplies, and offer big savings over brand-name DR420 laser drum unit and supplies. The TN450 are the replacement laser toner cartridges that fit into the DR420 drum housing. You can replace your Brother TN450 without replacing the entire DR420 drum housing. The use of compatible replacement laser toner cartridges and supplies does not void your printer's warranty. We offer a 100% Quality Satisfaction Guarantee on our compatible DR420 laser toner cartridges and supplies.