Yield - These maintenance kits are Designed to be installed in HP LaserJets: 4200, 4200N, 4200TN, 4200DTN, 4200DTNS, 4200DTNSL Family of Printers. - Equivalent Part Numbers:Q2429A, Q2429-69004, Q2429-67904 - Contents of Premium Compatible LJ 4200 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.