TRUE IMAGE Compatible Ink Cartridge Replacement for HP 90A ( Black ) High Page Yield: 10,000 pages @ 5% coverage Compatible Printers: HP LaserJet Enterprise M4555 MFP series; LaserJet Enterprise 600 M601, M602, M603 series New Replaces: HP CE390A Certifications: ISO9001, ISO14001, CE, STMC Warranty: Lifetime 100% satisfaction guarantee