Reach for 1.5" OD Round Tubing as the go-to rail material for a straight stair run, a balcony edge, or a guardrail — the tube you cut to length and build the whole run from. At 1.5" OD with a.050" wall it is the most common handrail size and a comfortable, easy-to-grip diameter. Order it by the length in 4, 5, 6, 8, 12, or 20 feet. Choose from five finishes: 304 Polished or Satin for interior rails, 316 Polished or Satin for marine-grade corrosion resistance outdoors, or Polished Brass for a warm, traditional look. It pairs with matching splices and fittings in the 1.5" line, so one staircase or a full project goes together from a single family of parts.