Genuine HP 680 black ink advantage cartridge. Compatible with HP DeskJet Ink Advantage 3635, 3636, 3638, 3775, 3776, 3777, 3778, 3779, 3835, 3836, 3838, 4535, 4538, 4675, 5075, 5078, 5088 and 5278 printers. Reliable black text for everyday office and home printing. Please confirm your exact printer model before ordering — WhatsApp us if unsure.