Like changing the oil in your car prolongs the life of your engine, proper maintenance improves print quality and prolongs the life of a printer. DPI printer maintenance kits keep your printer in optimal condition. These kits provide all of the parts necessary to perform do-it-yourself maintenance on your printer to help extend your printer"s life. All of our maintenance kits offer market-leading quality and OEM performance, at a significant cost savings. The entire DPI line is manufactured in state-of-the art facilities and supported by a best-in-class warranty and technical support program. This maintenance kit is compatible with HP LaserJet 4240, 4240N, 4250, 4250N, 4250TN, 4250DN, 4250DTN, 4250DTNSL, 4350, 4350N, 4350DTN, 4350DTNSL and includes 1 Fuser, 6 Feed/Separation Rollers, 1 Tray 1 Pickup Roller, 1 Transfer Roller. It has an expected yield of up to 225,000 pages dependent upon print environment and media used.