Erw steel tubes in round, square, rectangular shapes. Square tube: 10~500mm X 10~500 mm X 0.6~12 Erw steel tubes in round, square, rectangular shapes.Square tube:10~500mm X 10~500 mm x 0.6~12mm(thickness).Rectangular tube:10~500mm X 10~500 mm x 0.6~12mm(thickness).Round tube: OD.8mm~300mm x 0.6~8mm(thickness).... Sell Erw Steel Tubes