1.No rags,safty and pleasure for kids 2.reliable quality 3.Non-toxic, environment-friendly 4.ISO9001:2000,CE,ISO14001,OHSAS1 1,Column: With Ø114mm column with thickness of 2.2mm gold-plated tubes or steel tubes2,Guardrail and handrail With 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: National standard steel pipe, welded by the ...