1,Stair handrail,A protective railing,Stainless steel Guardrail. 2,Diameter: From 10.0-159.0mm. 3,Thickness:From 1.0-5.0mm. 1, Name: Stair handrail,A protective railing,Stainless steel Guardrail.2, Material: Stainless steel composite pipes, [Inner Layer: Carbon Steel Q195-235, Outer Layer: Stainless Steel SUS201/304]3, Diameter of Pipe: From 10.0mm to 159.0mm.4, Wall-Thickness of Pipe: From 1.0mm ...