Yield 200K These maintenance kits are Designed to be installed in HP LaserJets: 4100, 4100N, 4100TN, 4100DTNFamily of Printers - Equivalent Part Numbers:C8057-69003 C8057-67903 Contents of LJ 4100 Maintenance Kits: 1 Fuser Assembly, 110V - 6 Feed/Separation Rollers - 1 Transfer Roller - 1 Tray 1 Pick-Up Roller - Gloves - Instruction Manual - Toner Overnight's Premium Quality Compatible Maintenance Kits are guaranteed 100% replacing the OEM item. All Premium Quality Compatible Products are designed to precision engineering standards that meet or exceed OEM standards. By purchasing maintenance kits on exchange you are agreeing to send us your defective fuser within 15 days of purchase. Old fuser (core) return is required or your credit card will be billed for the cost of core replacement $100.00.