Lexmark Fuser Maintenance Kit 40X7616 85000 Pages LaserLexmark Fuser+ITU Maintenance Kit 85,000 pages CS CX 310 410 510 Fuser + ITU Maintenance Kit, 220 240V It is recommended that the maintenance kit be installed every 85,000 pages (based on an average of 3 pages per print job and approximately 5% color coverage) to maintain print quality and device reliability. Specification for 40X7616 Features Brand compatibility Lexmark Compatibility CS510dte, CX310dn, CS410dtn, CS510de, CX410dte, CX410e, CX310n,