1,High quality magnesia brick , 2,MgO>93%,CaO<2.0% 3,Good machenical performance in high ... temperaturer , 4,ISO9001:2000 certi For the magnesia brick,the ... tech data is: Index Item Magnesia brickHigh quality magnesia brickMZ-91MZ-89MZ-87LMZ-95LMZ- ... %(1650x2h)0-0.50-0.60-0.60-0.4 magnesia brick