89x89x3.5 Square Tube is a Welded Structural Grade that is available in AS/NZS 1163 & in C350 & C250 Grades depending on its Size & wall Thickness, Most Available in Galvanized & Primed. RHS & SHS are Ideal for all structural, general fabrication, manufacturing, Fence Posts and DIY projects. Steel Tube is used in industrial fabrication, welding, transport equipment, Plumbers Kerb Pipes, trailers, sheds, carports & much More! Square & Rectangle shape Tubes, allow greater strength compared to other steels such as angle & Flatbar. RHS & SHS Steel Tube is easy to cut, weld and machine. THE METAL WAREHOUSE stocks & Supplies a Wide Range of Shapes & Sizes at Warehouse Prices Direct to Public.