1.Cheap price,high strength, 2.reliable,durable,fast delivery, 3.perfect quality & secure packing. 4.No any crack,burr Our ... & high strong alloy aluminum.2.Heat-treat: annealed, quenching & tempering.3.Surface Finishing: sand blasting, self-color with oil, painting, electric ... we ensure thoughtful services and competitive prices. quality systems galvanized Ring lock Scaffold