Insulating Firebrick: Grade: 23,26,28,30 Size:230x114x65~76mm Temperature: 1300C-1600C customized production is available LUYANGWOOL® insulating firebrick is ... kiln,shuttle kiln,glass-pool kiln,tec Standard SpecificationGrade: 23,26,28,30Classification temperature:1300/1400/1500/1550/1600Size: ... available. For more information,please contact us ! Insulating Firebrick ( best quality and lowest price )