High-temperature plug is made of copper and ceramic as conductor; jacked with metal aluminium or silicon rubber. Jacked with metal aluminium alloy one could stand high-temperature 500 degree. The standard voltage is 220V to 600V the diameter could be 5mm and 6mm Jacked with silicone rubber one is acid, alkali and protected-broken. It could stand high temperature 200 degree and high-voltage 220V to 600V.