TULIP Continuous Ink Delivery System [CIDS] for HP 5000 / 5500 DYE series printers is an easy to install bulk ink system. It features 6 ink reservoirs which can be refilled as needed by the printer operator. By avoiding the need for costly ink cartridges, this TULIP CIDS provides the most economical solution for printing on these printer models. For use with TULIP WS20 inks. User-installable and requires no permanent modification to the printer. Comes with communicator chip, easy installation guide, and start ink set of 6 WS20 liters (1 liter of each ink color).