Square Steel Pipe 1. Outer diameter: 10*10mm-500*500 2. Wall thickness: 0.5mm-20mm 3. Standard: ASTM A500, DIN2394, JIS-G344, GB/T3091-2001 4. Material: Q235, Q195, Q345 5. Length: 1-12 meters 6. Packing: as per customer¡¯s requests Application: Widely used for the furniture, billboard, communication and so on. Pls contact me via summer(at)hnssd(dot)com/ +86 0731 88678503 +86 15974114261