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Epson WorkForce ET-4550 Ink Cartridges - T774120 Cartridges provides high quality compatible & OEM printer cartridges & supplies for the Epson WorkForce ET-4550. Our compatible T774120 ink cartridges are guaranteed to meet or exceed the factory cartridge specifications, and are backed by our Lifetime Cartridge Warranty. We also carry a full line of OEM cartridges backed the the original manufacturers one year warranty.