Our HP Ink Cartridge replacements for the HP Deskjet 3550 cartridges are designed and manufactured by an ISO-9001 facility and match Genuine HP name-brand cartridges at a fraction of the cost. These HP Deskjet 3550 Ink Cartridges will provide optimal print quality and page yields. We've been selling products like compatible HP Deskjet 3550 Printer Ink Cartridges for over 13 years and think you'll find great value in comparison to the HP OEM Deskjet 3550 supplies.