... mullite brick is compressed in vacuum and sintered under high temperature. Application Lining and back lining of various furnaces in the industry of ... heating furnace, tunnel kiln,shuttle kiln,glass-pool kiln,tec Standard SpecificationGrade: 23,26,28,30,32Classification temperature:1300/1400/ ... For more information,please contact us ! fireproof brick(best quality standard size of brick in China)