BrassCraft 3/8 in. O.D. tube copper riser for faucet installations with 3/8 in. compression nosepiece. For faucets with 3/8 in. O.D. pigtail water supply connections. Includes compression sleeve and nut. Riser can be cut-to-length for flexible fit with a clean, professional appearance. For use in potable water distribution systems in accessible locations only.