This genuine HP Imaging Drum Unit is essential for creating the electrostatic charge necessary to transfer toner to the page. Designed for LaserJet 1500 and 2000 printers, it offers a 20,000 page yield. To ensure that your printer is working at its maximum level of efficiency, you need to keep all of the individual components working as well as possible. HP understands this and designs high quality replacement parts to keep your printing at its best.