Inkjetcorner inkjet cartridges for your printers are built to meet the same original specifications and performance standards as the OEM cartridges. Compatible with the following printers: iP3600, iP4600, iP4700, MP560, MP620, MP640, MX860, MX870, MP980, MP990 How to install / Replace new ink cartridge: Step 1: Pull off tape (if any) the yellow/clear sealing tape on top of the cartridge. If there are no tape on the top, proceed to Step 2Step 2: Turn cartridge upside down and remove the orange cap/bracket off the cartridge Step 3: Insert the cartridge into the corresponding slot and push down on the cartridge until you hear a click sound Step 4: This Step is optional. Run a Printhead clean on the cartridge. this will flush out residue leftover from previous use