This Original Dell TJ987 (593-10241) Imaging Drum Unit is a brand new genuine product that has been thoroughly tested and validated on original Dell systems to ensure the highest possible quality can be achieved. The purpose the TJ987 Drum Unit it to transfer the toner power from the Cartridge onto the page.The Genuine 593-10241 Imaging Drum Unit has an impressive page yield of 30,000 (based on a 5% coverage) and is designed to be compatible with the Dell 1720 Printer. This Original TJ987 offers great value for money, low cost printing and comes with our 100% satisfaction guarantee.