Sonya Ceramics manufactures Cordierite Refractory Tubes and Bobbin Set. Sonya Ceramics is an ISO 9001 certified 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 Cordierite Refractory Tubes and Bobbin Set are used in mainly Water Heaters.