Check the listing for details. SR Smith Spa Rail Without Hardware S.R. Smith (SR-100). Color: Stainless Steel, Condition: New. Listed at 699.99 USD. The Spa Rail by S.R. Smith is a stainless steel, ring handrail designed to increase safety by assisting spa users into and out of the spa. Available in traditional Stainless Steel for chlorinated swimming pools or in Marine Grade which are made with a thicker grade Stainless Steel intended to withstand tougher environments and are recommended for salt chlorinated pools. For a touch of color, you can add a Powder Coating, which extends the life of your pool rail by protecting against corrosion and chemicals and is scratch and high impact resistant. Powder Coating is available in two different colors: Pearl White or Taupe. Tubing: 1.625" OD Wall thickness: .049" Type: 304 or 316L (marine grade required for salt pools) stainless steel .