HP DesignJet 20PS ink cartridges and supplies. Guaranteed quality, lowest price and same day shipping! Our compatible cartridges and supplies for HP printers are specially engineered to meet or exceed the print quality of the OEM(Original Equipment Manufacturer) cartridges. Purchasing our HP cartridges is a great way to save money without sacrificing print quality. All our compatible HP cartridges have one year warranty and satisfaction guarantee so you can shop with confidence and save time and money.