kinds of shape for the heater U,W,I,L,U-right highest temperature could ... hightemperature. It is used to the highest temperature up to 1800 degreesduring oxidizing atmosphere.* Dia. 3,4,6,7,9,10 ... ,12,18,24* Temp: 1000-1800 celsius degrees* Used in the industries of metallurgy, magnetic ... cremated under the strong oxidizing function in the low temperature. 1800 U type mosi2 electric heater