This corrosion-resistant boarding and landing assist grab rail has contoured handles on 18" centers. It stands 36-3/4" high. The rail is fabricated from 1.5-inch lightly buffed stainless steel tubing and is tig welded. The stainless steel mounting tubes are 12 gauge and top welded to a 7 gauge stainless steel plate. There are four holes for 3/8" bolts or screws (not included).