4inkjets.com's compatible Brother DR400 laser drum unit is guaranteed to perform with your Brother laser printer. It replaces the original Brother DR400 laser drum unit. The compatible replacement DR400 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 DR400 and offer high-quality printing results. Manufactured with brand new parts, they are an economical alternative to expensive OEM DR400 Brother laser drum units and supplies, and offer big savings over brand-name DR400 laser drum unit and supplies. The use of compatible replacement laser toner cartridges and supplies does not void your printer's guarantee. We offer a 100% Quality Satisfaction Guarantee on our compatible DR400 laser toner cartridges and supplies.