... mould for round/square/shaped tube.2. Pipe mould: steel tube, plum tube, flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove ... precise; 10 years experience in RD, the fingerprints, mechanical pattern, on the corner, concave angle phenomena, and to form tolerance ... of roundness in les than 0.05mm, square tube on the angle does not exceed ±0.05mm. Roll set for tube machine