ÞThe Premium Toner Cartridge ALT Replacement DR 420 Drum Unit is a high-quality black drum unit specifically designed for HP printers. This unit is compatible with the DR420 model and is made by the Premium Toner cartridge brand. With a print technology of laser, this premium drum unit offers reliable and professional printing results. Manufactured in China, this unit is a cost-effective alternative to original HP drum units, providing consistent and impressive print quality for your documents and images.