... well performance, they are widely used in high temperature furnace, ceramics, glass, analysis and test, semiconductor, science research ... without any protection atmosphere. 4. It is extensively used in the fields of metallurgy, ceramics, glass, machinery ... type (Three Phase type), Solid Rod type, Spiral type and 5 piece type (dual hot zone) or according to your requirement.II. Dia. 8-45mm for all ...