The Ricoh Maintenance Kit (Part No. 406643 / 402816) is a high-capacity maintenance kit designed for the SP 4100 series (including SP 4100, SP 4100N, SP 4110N, SP 4210N, SP 4310N) monochrome laser printers.
It comprises key wear-components (fuser unit, transfer roller, feed and friction rollers) that are replaced as part of routine upkeep to ensure continued print quality and machine reliability