... our own factory 4.Yield:BK:5500p/6000p CE400 color toner cartridge Compatible HP Laserjet 551/500 Modle CE400,CE401,CE402,CE403Color ... use the best raw materials.√.We are the factory of toner cartridge √. CE , ISO9001 and ISO14001 Standard.√.NEW!!! Or Remanufactrued!!! as ... compatible is 24 months, for recycled ink cartridge is 12 months, for laser toner cartridge is 12 months.3.we will replace ...