used crowd control barrier fence /barricades temporary fence for sale US $11.1-22.2 / Piece 500 Pieces (Min. Order) Frame Material: Metal Type: Fencing, Trellis & Gates Material: Steel Tube Place of Origin: Hebei,China (Mainland) Brand Name: QYM Fence Web:http://www.wiremeshglobal.com/ 1.Surface treatment:Hot dipped/Electro galvanized,Electrostatic spraying 2.Material:three types:round pipe,square pipe oval pipe 3.Advantage:good oxidation resistance,strong,durable and flexible construction 4.Process: 1)galvanizing before welding or made of galvanized steel tube and then welded 2)welding before galvanizing (only feasible for guardrail with relatively small size)