... plaintedtorsion spring materialspring steelwire diameter5.5mminside diameter33mmcoils5.5finishzinc painted As the biggest manufacturer of spring in FoShan area,you can ... wire form, even punch fitting of hardwareUsage:auto,motorcycle,industry,ariculture,mine,furniture,elevator and so onWide range offered wire ... designs are welcome,so send us your specifications now. Used for the display springs