Sonya Ceramics offers Magnesium Silicate Cartridge Heaters and End Seals. Sonya Ceramics is an ISO 9001 accredited company. Sonya Ceramics also manufactures Ceramic items made from Porcelain, Steatite, Cordierite Refractory, Cordierite Tube and Thermo Couple Heads, Insulators, Alumina Refractory and High Alumina of different grades. The Magnesium Silicate Cartridge Heaters and End Seals are used at the end portion of Thermocouple or Heaters as Insulator.