... high quality silicon steel sheet, the main material for the 0.35 thick H18, H14, H12, ... to achieve the best performance. (Conventional material for Taiwan's strong piece of steel H18 0. ... SEIW, FEAI enameled wire, and glass envelope, the temperature rating for the F-level (155 °C), H-level (180 ° ... 200 °C), C-level (220 °C). (Class B rating for general temperature 135 °C) 3) insulating material DMS with ...