Page Yield*: 20,000 pages Compatible with HP 42X High Yield (Black) (per cartridge) *at 5% coverage (ISO/IEC standard) Package Contents: 2 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.