... -60,30-80,60-80,80-120 (mesh)Size of powder: -200mesh,-270mesh,-325meshPhysical and chemical index: Item/GradeYNS45YNS45YNS44YNS44YNS43YNS42YNS40YNS36ABAB AL2O3 % 46 ... mainly used for manufacturing high-quality refractory products, refractory castable, sagger, kiln furniture, crucibles, ceramic fiber, precision casting sand, ceramics products, etc. Refractory chamote for refractory materials