... compression springs is produced by Jiangsu Xiangying Hardware Spring Co., Ltd.This kind of spring is ... compression springs are processed by environmentally friendly (ROHS) nickel, zinc, electroplated, gold, silver, copper, black, ... springsMaterialStainless steelWire Diameter0.1-65mmSurface TreatmentEnvironmentally friendly (ROHS) nickel, zinc, electroplated, gold, silver, copper, black, ...