QGHS series insulation ring is made by comfidencial ratio and fiber glass, it is high strength and high temperature resistance and insulation performance. It is fixed in the starter motor armature, it can enlarge the armature performance. the ID, OD, width and color can be customized. Now we act as the supply chain for Bosch, Valeo sites and other brand. We can delivery the quality goods in 7-15 days. Welcome contact us and visit us if any chances.