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No Norm Level 01 SiO2 53 % 02 Al2O3 37 % 03 Heat resistance 950oC û air 11 Times 04 Bulk specific gravity (g/cm3) > 1.72 05 Compressing strength (N/mm2) > 35 06 Refractory temperature 1,750oC Packing method: in carton box, container 20 feet, 40 feet