Union Connector JF-1544 Tube 1/4" x 1/4" JF-1564 Tube 3/8" x 1/4" JF-1566 Tube 3/8" x 3/8" JF-1568 Tube 3/8" x 1/2" JF-1588 Tube 1/2" x 1/2"
