B223-4531 Duplex Guide Plate Cover for MP4000 5000 4002 5002 MP C5502 C4502 C3502 C3501 C3001 C5501 C4501 C3501 This B223-4531 Duplex Guide Plate Cover is designed to fit the following models: MP4000, MP5000, MP4002, MP5002, MP C5502, MP C4502, MP C3502, MP C3501, MP C3001, MP C5501, MP C4501, and MP C3501.Each unit is tested individually prior to shipment to verify proper function.The component plays a role in the duplex printing mechanism, helping to guide paper through the system to support two-sided printing operations.