Page Yield*: 20,000 pages Compatible with HP 42X High Yield (Black) (per cartridge) *at 5% coverage (ISO/IEC standard) Package Contents: 4 x HP 42X Q5942X Black Compatible Toner Cartridge Replacement Compatible with the following LaserJet printers: 4250n, 4350n, 4250dtn, 4250dtnsl, 4250tn, 4350dtn, 4350dtnsl, 4350tn, 4350, 4250. Product Name: HP 42X Q5942X Black Compatible Toner Cartridge Replacement for HP 42X HP-42X Professional compatible replacements manufactured by LD Products. HP is a registered trademark of HP Inc. and is not affiliated with and does not endorse LD Products. Item Includes: Replacement Toner Cartridge Compatible with HP 42X Q5942X High Yield (Black, 4-Pack). Our Compatible cartridges for Hewlett-Packard are built to perform. This is a remanufactured cartridge and it was not manufactured by HP. This set works in the following HP LaserJet 4250, HP LaserJet 4250dtn, HP LaserJet 4250tn, HP LaserJet 4250n, HP Our cartridges are good for home, office or when you're running a business. Our products are put through a rigorous testing process where they are monitored for quality and reliability. Knowing the toner cartridge that works most efficiently with your printer model is important. Please note, retail packaging may vary and these cartridges will only work with printers purchased within the United States and Canada. The use of compatible cartridges does not void your printers warranty and our cartridges are not manufactured by HP. We are the exclusive reseller of LD Products brand of high-quality printing supplies.