Universal HP Pigment Ink refill pack - compatible with pigment ink based HP inkjet Printer(s) (such as the HP Officejet Pro 8100, 8600 Series and many more). Includes 100ml refill bottles (1 each for Black, Cyan, Magenta, Yellow) with smart pouring spouts. This is also a perfect refill pack for use with Continuous Ink Systems (and with the smart pouring spout, you can pour ink directly into the fill holes of all continuous ink systems). Only the ink is included (no additional tools or instructions are provided). This refill pack is intended for refillers who know how to refill their HP ink cartridges. With the 100ml per color included, you can refill most HP cartridges 5-8 times each per color. This is pigment ink made to compare as close as possible to the OEM HP ink, and is also UV resistant and archival.