This drum cleaning unit is designed for use with 10X DK-1150, DK1150, and 302RV93010 drum units and is compatible with M2040, M2135, M2540, M2635, M2640, M2735, P2040, P2235, M2040dn, and M2135dn printers.It helps remove residual toner from the drum to support consistent print output and extend the life of imaging components.