... toxic, environment-friendly 4ISO9001:2000,CE,ISO14001,OHSAS18000 Outdoor playground equipment1, Column: With Ø114mm stand column with thickness ... Ø 60mm, thickness of 2.2mm steel, Ø 32mm, thickness of 2.2 mm pipe, Ø25 mm, thickness of 2.2 mm steel. 3,Metal: ... South Korea, by microcomputer control of four stations roll-plastic equipment, rolled into equilibrium, high strength, sound thickness with the ...