... into two parts, hot zone and cold zone with a joint. Resistance of both legs are equal to ensure a ... resistance and allowable surface loadings of the Double Spiral Shape Type are substantially higher than other silicon carbide elements, consequently ... Types: We make Rod type(ED type), Dumbbell type(DB type),U type, W type (Three Phase type), Solid Rod type, Spiral type and 5 piece type (dual hot zone ...