Heavy duty flat coil spring 1.OEM & ODM accepted 2.widely used in electric fans. 3.Quality:ISO90001&ISO14001quality control Heavy duty flat coil springFeature:1.Spec.:The size and style are made by drawings.OEM & ODM acceptedThickness:0.04mm-1.2mmWidth:2.5mm-80mm2.Material:Spring steel,stainless steel,zinc plating steel,etc. 3.Surface treatment:powder coating,nickle plating,chrome plating,zinc ...