400ml Refill Ink for Hewlett-Packard HP Inkjet Printers, Cartridges, and CISS (4 x 100ml), Black, Cyan, Magenta, Yellow by Dram Tree Inks (TM) Set contains 100ml each of Black, Cyan, Magenta, & Yellow Dye-based Ink Will refill most cartridges several times over, saving you money! Designed for use in Hewlett-Packard (HP) inkjet printers Long, narrow nozzle helps eliminate spills Guaranteed 1-year shelf life