1.Cheap price,high strength, 2.reliable,durable,fast delivery, 3.perfect quality & secure packing. 4.No any crack,burr Our web: www.4cscaffold.com 1.Materials: mild carbon steel, low alloy steel, forged mild steel, precision casting steel & high strong alloy aluminum.2.Heat-treat: annealed, quenching & tempering.3.Surface Finishing: sand blasting, self-color with oil, painting, electric plated, ...