... .5mm inside diameter:33mm finish:color zinc plaintedtorsion spring materialspring steelwire diameter5.5mminside diameter33mmcoils5.5finishzinc painted As ... the biggest manufacturer of spring in FoShan area,you can expect these from ... form, even punch fitting of hardwareUsage:auto,motorcycle,industry,ariculture,mine,furniture,elevator and so onWide range offered ...