Two tubes welded toghter,light,elastic,easy to handle,anti-erosion,resistant to fire,and easy to distinguish. Applications: 1) Being widely used in ... ) Two tubes welded toghter,light,elastic,easy to handle,anti-erosion,resistant to fire,and easy to distinguish.Specifications: Metric MeasurementW.P.B ... ×1113/64511502.57.510XZII-6×31/46122.06.011.5XZII-8×2. 55/168132.06.011XZII-9×33/89151.54.515XZII-10 ...