8/6/8 656 double wire security fence for climb US $9.5-65.5 / Set 100 Sets (Min. Order) Pressure Treated Wood Type: Nature Frame Finishing: Powder Coated Type: Fencing, Trellis & Gates Model Number: double wire Metal Type: Steel Brand Name: QYM Fence Web:http://www.wiremeshglobal.com/ 656 double wire fence: horizontal steel wire with two wire diameters 6mm, vertical steel wire in the middle of wire diameter 5mm; 868 double wire fence: horizontal steel wire with two wire diameters 8mm, vertical steel wire in the middle of wire diameter 6mm.