AZTECH Compatible Toner Cartridge Replacement for HP 87A CF287A 87X M506dn HP LaserJet Enterprise M506dn M506n Printer M506 M506x HP Pro M501dn LaserJet MFP M527dn M501n M527z M527f Ink (Black-1 Pack) COMPATIBLE WITH PRINTERS: HP LaserJet Enterprise M506 M506n M506x M506dnMFP M527 series m527c, HP LaserJet Pro M501n M501dn Compatible for 1 Pack HP 87A Cf287A 87X CF287X Black Toner Cartridge 9000 PAGES PER CARTRIDGE FRIENDLY & PROFECTIONAL PHONE IN SERVICES GUARANTEE HAPPINESS, REPLACEMENT / REFUND? IT'S YOUR CALL