Clever Supplies brand products are made with high quality components. Why pay more for cheaper product with a high defective rate? You will end up having to send it back to the manufacturer. Your time is valuable. Get a quality product that you KNOW will work. Purchase the Clever Supplies Compatible for Lexmark 521H (52D1H00 ) Black and experience the difference! All Clever Supplies brand products are backed by '100% Quality Satisfaction' 1 year warranty against defects in materials and workmanship for all toner products. Free tech support for a Clever Supplies problems for all Clever Supplies brand products. The use of Clever Supplies brand replacement laser toner cartridges and supplies does not void printer warranty. Premium Quality Replacement Toner Cartridge is made by ISO9001 Certified Factory to Meet or Exceed OEM Standards. These units are manufactured 100% brand new with all new parts including OPC drums, wiper blades, a smart chip and other internal parts, they are an economical alternative to expensive OEM 52D1H00 Compatible Toner Cartridges. This is a Compatible for Lexmark toner cartridges Black guaranteed to perform with Lexmark Laser Printers. It replaces the original Lexmark 521H toner cartridge Black. The compatible replacement for 52D1H00. We offer a 100% Quality Satisfaction Guarantee on our Compatible for 52D1H00 laser toner cartridges and supplies. For use in the following printers: MS Series MS710dn, MS710n, MS711dn, MS810de, MS810dn, MS810dtn, MS810n, MS811dn, MS811dtn, MS811n, MS812de, MS812dn, MS812dtn