Stainless Steel Square Tube by the Foot, 3 ft to 19.7 ft Long

Stainless Steel Square Tube is commonly used as a handrail or top rail for premium modern railing systems. Tubes are available by the foot in pre-cut standard lengths from 3 ft up to 19.7 ft. Dimensions: 1.57" x 1.57" / 40mm x 40mm Wall Thickness: 0.102" / 2.6mm / Gauge 12 Approximate Weight: 2.09 lb/ft Material & Finish Options: Satin Finish: AISI 316 Marine-Grade Stainless Steel (Ideal for coastal, pool, and heavy outdoor environments) Black Matte Powder-Coated: AISI 304-Grade Stainless Steel (Optimized for interior or standard inland outdoor environments) Heavy-duty value: This 40mm x 40mm square tube weighs approximately 2.09 lb/ft. While some budget handrail sections may appear cheaper per linear foot, many use thinner rectangular profiles and do not clearly publish wall thickness or weight. Long continuous lengths: Available up to 19.7 ft to reduce visible joints and create a cleaner, more solid railing installation compared with shorter handrail sections that require splices. Joining option: Multiple tube sections can be joined together using our Stainless Steel Flush Angle Square 180 Degree Connector. This allows longer handrail or top rail runs to be assembled from shorter sections when needed. This heavy-duty stainless steel square tube can be used for a variety of applications, including: Hand railing Top rail for cable railing or glass railing systems Foot rail / bar railing Queue railing Pony rail mounted on top of a wall Bathroom vanities Shelving systems Shipping Note: Lengths over 8 ft must be shipped by LTL freight. When shipped by LTL, shorter pieces may be combined with longer pieces in the same crate. For example, if an order includes a 12 ft piece and a 7 ft piece, we may ship them together in one 19.7 ft wooden crate by LTL freight. Standard vs. Custom Cuts: All lengths listed in the dropdown menu are standard pre-cut sizes; the pricing covers all handling and cuts with no extra fees. If your project requires an exact custom cut (e.g., exactly 6 ft 4 in), a custom setup fee will apply to cover labor and material waste. Please contact Sales at (425) 405-4405 for custom cut orders and shipping quotes.