Inclusions: Compatible Toner Cartridge Replacement for 49X Q5949X High Yield Black 9-Pack Compatible with the following LaserJet printers: 1320, 1320n, 1320nw, 1320t, 1320tn, 3390 and 3451 Page Yield*: 6,000* For best results, store in a cool, dry place. Use within 3 years of purchase for optimal performance.*at 5% coverage (ISO/IEC standard) Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.