This is a replacement OPC drum cleaning unit compatible with the following printer and copier models: M2040, M2135, M2540, M2635, M2640, M2735, M2835, P2040, P2235, P2335.It is designed to replace part numbers DK1150, DK-1150, and 302RV93010.The unit restores printer functionality by maintaining proper drum cleaning during.Each unit undergoes functional testing prior to shipment and is packaged to prevent damage and toner leakage.Packaging may vary based on production batch but does not affect compatibility or performance.Please verify your device model before purchase to correct fit.