Amazon.com: HP 81A Black Toner Cartridge | Works with HP LaserJet Enterprise M604, M605, M606 Series; HP LaserJet Enterprise MFP M630 Series | CF281A : Office Products
Advantage Brand CF281A MICR Toner Cartridge for M604 M605 M606 for $185 - Advantage Laser
QuikShip Toner
Hewlett Packard Laserjet Enterprise M606 X Black Toner #006R03336