a.Stainless steel Handrails / Stair Railings. b.Outside Diameter 10~219mm, Tolerance 0.1~0 ... 0~10.0mm. Stainless steel Handrails / Stair Railings.This appliance is good for Isolation Railings, Bridge Ralilings, Deck Handrails, Stair Handrails, ... Balcony Railings..etc.a. Outside Diameter φ10mm~φ219mm, Tolerance ...