Bulk Continuous Ink System (CIS) for No more Ink Cartridges purchase, no more cartridges replacement, refillable ink cartridges, ink reservoirs enable countless refills. Pre-filled with 125 ml x 2 colors and 100ml x 4 colors = 650 ml of premium UV(Ultra Violet) Resistant Dye based In Quick and Easy installation, you will be printing in minutes 80 percent saving on individual Inkjet Cartridge Auto-reset chipsets reset the cartridges so there is no need to utilize a chip resetter nor take the cartridges out of the printer to refill