Compatible Replacement-COC-Smart-Chips-For-Epson-786XL-Cartridges Compatible with Epson Workforce Pro refillable cartridges. No gluing required. Compatible Printers: Workforce Pro 4630 4640. These printers can only use a one-time chip. The complete chips set must be replaced when it shows one cartridge is empty or ( cannot be recognized ) Replacement Yellow, Cyan, Magenta, Black chips at the same time Compatible with Epson Workforce Printers That Use The 786 Cartridges Just Snap It On! Simple and Easy Comes with a replacement chip holder All chips are check before shipping and the latest chip will be sent. Chips are nonreturnable. Our American made " Ultra Pro True Color Ink " prints roll to roll or sheet to sheet with a consistent color match. Our quality control techniques including surface tension, viscosity, pH, conductivity, specific gravity, and color match by spectrophotometer. We test new ink in real-time test modes. Our compatible inks are rigorously tested to meet and exceed the highest customer expectations by means of ISO 24711 and other print performance criteria. LEGAL NOTICE Epson, Brother, Canon, HP, Sawgrass, and other manufacturer brand names and logos are registered trademarks of their respective owners who have no association with or make any endorsement of the products or services provided by inkproducts.com Any use of a brand name or model designation for a non-OEM cartridge or product is made solely for purposes of demonstrating compatibility. Inkproducts.com makes no claim of affiliation, endorsement, or sponsorship of any of its products or services (including this site and all products and services referred to on this site) by any other company or person.