... 325mesh(mesh can be adjusted according to the customer's requirements)2.Filling GradeSpecification: SiO2≥ 50%,CaO≥ ... 8%,Al2O3≤0.8%, LOI≤2%,oil absorption 20-30%,S ≤ 0.03%,P ≤ 0.03%,Fe≤0. ... 325mesh(mesh can be adjusted according to the customer's requirements) 3.Ceramics GradeSpecification: SiO2≥ 49%,CaO≥ ... (mesh can be adjusted according to the customer's requirements)If you are interested in our products ...