R.V:100KV material: ZnO varistor, silicon rubber housing certification:ISO9001 confirm to IEC60099-4, JB/T8952-2005,JB/T10497 Product's characteristics:good sealing performance, special structure, anti-moisture and anti-explosionits performance in heat-release and ability to absorb over-voltage is goodsmall volume, light weight, flexible installation, collision-resisting, high pull-resisting ...