... of 2.2mm steel, Ø 32mm, thickness of 2.2 mm pipe, Ø25 mm, thickness of 2.2 mm steel. 3,Metal ... : National standard steel pipe, welded by the Japanese OTC robot welding system, strong and ... color on the metal parts bright for long.4,Plastic: Imported LLDPE from South Korea, by microcomputer control of four stations roll-plastic equipment ...