Tube roll set for tube making machine. die set,pipe roll set. Roller and mould, welded pipe ... . 2. Precise with only 0.05mm tolerance. 3. With CNC machine. 1. Description: Roller and mould, welded pipe roller, stainless steel ... , concave angle phenomena, and to form tolerance of roundness in les than 0.05mm, square tube on the angle does not ...