1,Stair handrail,A protective railing,Stainless steel Guardrail. 2,Diameter: From 10.0-159. ... 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 ... :±6mm.6, Length: In general 6meters long, or customized.7, Certification: ISO9001:2000 and ISO14001:2004.8, Applications ...