HP 33 Mobile Black Inkjet Print Cartridge is ideal for business or home users who want the flexibility of printing wherever they go. The HP 33 is a 300 dpi black ink print cartridge that delivers sharp professional quality documents anywhere, anytime with rich black text and graphics. It is built to work with HP portable printers to deliver optimum quality with rugged dependability. It contains genuine HP ink that provides quality and reliability every time you print. Ink cartridge is designed for use with Deskjet 310, 320, 340, Deskwriter 310 and 320 Series. Yields 480 pages based on 5 percent coverage.