1,compatible OEM ink cartridge 2,save printing cost 3,Easy to use 4,High quality,and cheap For use with EPSON Workforce 635,NX625inkjet printerCartridge No T1271 black, T1272 cyan, T1273 magenta, T1274 yellow Features: 1. Install with latest version V6.2N chips.2. After installing this chip,user is able to use third party ink freely ,and save printing cost3, Use as OEM ink cartridge chip