7-Piece Package of 1/4" (6.4mm) Round Styrene Tubing. Use for piping in industrial complexes or for flatcar loads. May also be used as round pylons in bridge, pier and other structures. Precision Extruded in White Styrene Plastic. Ideal for museum quality and smaller scale model construction where assembly speed, profile accuracy and cost are the determining factor. Length: 15" (375mm).