These commercial exterior handrails/railings were made from 1 1/2" inside diameter Scd. 40 steel pipe. The outside diameter of the pipe is 1.9". The height of the commercial exterior handrails is 36". The handrails are down in the concrete ramp 4". Handrails are held in by a quick set anchoring cement. Like the rest of our products, these commercial exterior railings have been finish with exterior powder coat.