... ,10kv,20kv,25kv,35kv High Voltage Electrical Insulation Plate The voltage 10kv, you can choose width ≥6mm, experimental voltage 10000v, no breakdown within 1minutes ... can choose width ≥10-12mm, experimental voltage 15000v, no breakdown within 1minutes;The voltage 0.4kv low tension, you can choose width ≥3mm ...