I DON'T NEED IT WITH THIS PRODUCT! IN THE PRODUCT POST, THIS INK IS CORRECT THAT THIS INK WAS COMPATIBLE WITH THE EPSON ECOTANK 3710. THIS IS NOT TRUE AND IN MY OPINION A FALSE ADVERTISEMENT! EPSON ECOTANK DEMANDS THE FILLING TIP THAT EPSON INK HAS ON EVERY BOTTLE BECAUSE IT IS IMPOSSIBLE TO FILL THE INK WITHOUT THIS TIP. THE SELLER MUST INFORM THE BUYER ABOUT THIS. THE PRICE I IS A GREAT PRICE BUT YOU CANNOT USE IT. IF YOU HAVE AN EPSON ECOTANK PRINTER, BUY SAFE, ONLY BUY THE RIGHT INK, AVOID DISAPPOINTMENTS AND SPEND MONEY ON THE RIGHT PRODUCT. IF I CAN'T GIVE STARS I WOULD BUT THEY WON'T ALLOW YOU.