Double Layer Constant Force Spring Xiamen Shuangyuan Springs Co., Ltd( Spring Division) Base Info Model NO.：SY-016Function：PressedMaterial：SteelUsage：Industrial, Auto, Furniture, Motorcycle, Home ApplianceLoad Type：CompressionShape：SpiralTrademark：shuangyuanOrigin：Xiamen, China Description Pre：Vacuum Cleaner Prestressed Power Spring Next：European Style Hook for Electric Wire Rope Hoist Capacity 10ton, Dougle Pulley , Falls 4/1, 4/2
