Nar Cartridges's HP CB387A (HP 824A) series compatible high yield drum units are guaranteed to meet or exceed original HP drum units in both print quality and page yield. Our toner cartridges have been engineered to create consistent, high quality images. Our Compatible with HP CB384A (HP 824A) series compatible drum units are made with the highest quality new and recycled components in ISO9001 / ISO14001 certified factories. Nar Cartridges offers 100% OEM compatible drum unit and a lifetime performance guarantee.