... heating device. These SiC productsare made from fine quality green silicon carbide as its main raw material. The raw material is made ... from Dia 12mm, 14mm, 16mm, 18mm, 20mm, 25mm, 30mm, 31.7mm (1.25inch), 35mm, 38.1mm (1.5 inch), 40mm, 44 ... .75 inch) to 54mm (2.125 inch) for all types. silicon carbide heating elements