HP Deskjet 842 C

HP C6625AN (HP 17) Tri-Color Inkjet Cartridge
C6625AN Tri-Color Inkjet Cartridge compatible with the HP DeskJet 825/ 840/ 841/ 842/ 843/ 845. The use of compatible supplies does not void your printer warranty.

HP C6615DN (HP 15) BlackInkjetCartridge
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.