4inkjets.com's compatible Brother DR820 laser drum unit is guaranteed to perform with your Brother laser printer. It replaces the original Brother DR820 laser drum unit. The compatible replacement DR820 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 DR820 and offer high-quality printing results. Manufactured brand new, they are an economical alternative to expensive OEM DR820 Brother laser drum units and supplies, and offer big savings over brand-name DR820 laser drum unit and supplies. The TN820 are the replacement laser toner cartridges that fit into the DR820 drum housing. You can replace your Brother TN820 without replacing the entire DR820 drum housing. 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 DR820 laser toner cartridges and supplies.