Scaffolding, Scaffolding System, Ringlock Scaffolding manufacturer / supplier in China, offering Q235 Leveling Hollow Solid Screw Jack Scaffold Galvanized Support Rod Height Adjustable Base Jack Scaffolding, China Wholesale Construction Gpin Heavy Duty Scaffolding Adjustable Steel Prop, Q235 Steel Scaffold Adjustable Base Jack for Building Structural Height (BS: EN39) and so on.