... .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 ... 120 km/hour wind. It is made of high tension Spring steel wire, can be used many times Without distortion. ... .0mm,2.2mm,2.3mm,2.5mm Wiggle Wire Spring For Greenhouse