Compatible with FS2000, FS2020, FS3900, FS3920, FS4000, FS4020, FS3140, FS3540, and FS3640 printers.This replacement part includes a drum cleaning unit, PCR (Primary Charge Roller), and OPC (Organic PhotoConductor) drum, designed for use with the FS3040 series.Each unit is tested to meet functional specifications prior to shipment.