The HP 738 300-ml Black DesignJet Ink Cartridge is a high-quality ink supply specifically designed for HP printers. This cartridge is compatible with the HP DesignJet T850 model and offers crisp, professional-quality black printing. With a convenient size of 11.140 x 4.650 x 1.610 inches, this ink cartridge is easy to handle and install, ensuring optimal performance for your printing needs. The HP brand ensures reliability and quality, making this cartridge a dependable choice for all your printing requirements.BRAND NEW - Left side flap is coming up but un-opened ( see third picture). ink expires August 2028.