Page Yield*: 840 pages Compatible with HP 15 Ink Black (per cartridge) *at 5% coverage (ISO/IEC standard) This Packages Includes the following Compatible Cartridges: 1 x HP 15 Black ink catridge C6615DN Compatible with HP Color Copier 310, HP DeskJet 3820, 810, 810C, 812, 812C, 825, 825C, 825Cvr, 840, 840C, 841, 841C, 842, 842C, 843, 843C, 845, 845C, 845Cvr, 920, 920C, 920Cvr, 940, 940C, 940Cvr Product name: HP 15 HP15 HP-15 Black Compatible Ink Catridge replacement for HP ink 15 (C6615DN) Professional compatible replacements manufactured by LD Products. HP is a registered trademark of HP and is not affiliated with and does not endorse LD Products.