Coffman's Silver Lining Cable Rail is made in the United States, has a 1/8" diameter, and uses Type 316 Stainless Steel. It can be used on the interior and the exterior of your home. Our C-6700 Craftsman Style Handrail complements our Cable Railing beautifully. For a interior only option, we also carry Horizontal Tubing. Give your staircase a contemporary modern look with Horizontal Tubing in Stainless Steel, Ash Gray, or Satin Black.