1.Special selected Spring Wire 2.Withstand wind up to 117Km/h 3.UV stablized Plastic coating 4.Best selection for greenhouse 1.It is a best and most economic option for greenhouse film fastening system, with our well designed Lockup steel or aluminum proifle, 2.it can withstand 120 km/hour wind. It is made of high tension Spring steel wire, can be used many times Without distortion. UV stablized ...