Aowo clay bricks has SK36, SK38, SK40 standard., also with LZ55, LZ65, LG75 etc. Alumina content is above 48%. Standard size is 230X114X65/76. We also can produce according to your detail demands. Our bricks are well accepted to foreigner customers for competitive price with high quality. Detail specification of high alumina bricks We are sure to give you best service and prompt attention.