Our galvanized steel round tubes combine strength with a clean, spangle-free surface. The hot-dip zinc coating prevents rust on patio chairs, handrails, and playground equipment. Easy to cut, weld, and powder coat. These galvanized steel tubes come in 25mm to 100mm diameters, wall thickness 1.5–4mm. Smooth internal bore for inserts. No red rust even after years of rain. Upgrade your outdoor product durability with reliable galvanized steel tubing.