AZTECH Compatible Toner Cartridge Replacement for HP 87X CF287X 87A CF287A for HP Laserjet Enterprise M506dn M506N M506X M506,HP Laserjet Pro M501dn M501N,Laserjet MFP M527Dn M527Z M527F Printer-2PACK COMPATIBLE WITH PRINTERS: HP LaserJet Enterprise M506 M506n M506x M506dnMFP M527 series m527c, HP LaserJet Pro M501n M501dn Compatible for 2 Pack HP 87X CF287X 87A CF287A Toner Cartridge 18,000 PAGES PER CARTRIDGE FRIENDLY & PROFECTIONAL PHONE IN SERVICES LIFETIME WARRANTY and GUARANTEE HAPPINESS, REPLACEMENT / REFUND? IT'S YOUR CALL