Type:Steel Square Pipe/Square Hollow Section Size:10*10mm-500*500mm, WT:0.5-20mm,L:0.3-18m Standard & Grade: EN10210:S235JRH,S355J2H,S355NG,S355J0H EN10219:S235JRH,S355J2H,S355NG,S355J0H ASTMA500:Gr.A,Gr.B,Gr.c AS1163:C250,C350,C450 Surface:Black bared,can be galvanized,oiled,painted. Packing:Waterproof plastic bag,bundled with strip Steel Hollow Section (Square welded steel pipe)are commonly used in various industries, including construction, manufacturing, and infrastructure. They provide structural support and are often used for building frames, machinery components, fences, handrails, and architectural applications. Size by Inch (diameter) Thickness Sizes by MM (diameter) Thickness inch inch mm…