Premium Quality C6615DN Black Inkjet Cartridge compatible with the HP DeskJet 3810, 3816, 3820, 3822, 810c, 812c, 825, 840c, 841c, 842c, 843c, 845, 920c, 940, 310, Fax 1230, OfficeJet 5110, v30, v40, v45, PSC 500, 720, 75. The use of compatible supplies does not void your printer warranty. Product Detail Ninestartechonline.com