MATERIAL：A234-WPB.A420-WPL6.A234-WP12.A234-WP11.A234-WP5.A403-WP304.A403-WP304L.A403-WP316.A403-WP316L.

 BENDING RADIUS (R)： R=3D、4D、5D、6D、7D、8D、9D、10D。

 BENDING ANGLE (θ)：15^o、30^o、45^o、60^o、90^o、135^o和180^o，and also could manufacture according the angles given by the clients.

 STRAIGHT LENGTH (L)： The length between two ends general from 300mm-1500mm, and also can product according to    the clients' requirement to product.

 OUTER DIAMETER (D)： D≤1220mm

 WALL THICKNESS (T)： T≤120mm