Inkcool 4pk Remanufactured Ink Cartridge Replacement for HP Printer Officejet 6100, 6600, 6700 Series hp932XL + hp933XL (1 Black, 1 Cyan, 1 Yellow, 1 Magenta) 1.With pigment ink 2.When you install the ink cartridges to the printer , it will have a note that not the original ink cartridge,please press continue button , then the ink will work . 3.Fast Shipment 4.ISO9001 Certified Compatible for HP printer: HP Officejet 6100,6600.6700