Read all the reviews read, and yet hesitated chosen wrong. Epson Stylus SX 440 W - the cartridges do not fit, the printer does not recognize the cartridge and obviously says "ink cartridges are not recognized - use it properly." Approximately 10 x I have used the cartridge, and true. Does not work !!!! Many comments go in that direction. Then have the suppliers, the company Ink Sent, written by mail, problem described and hoping to get a tip as it goes. Answer mutatis mutandis: The evil EPSON people update the printer, so that no foreign cartridges are detected. Uninstalling driver and possibly then reinstall, but refuse to update. Then "could" flip it, otherwise you can only use the original cartridges future. Frank Bessmann