二、Feature and purpose： The products are broadly applied in the ceramic kilns, fine casting and high-class wear-proof and refractory materials.
三、Size：Sand or powder of 0-1mm, 1-3.35mm, 3.35-5.6mm, 3.35-15mm, 16-30 mesh, 30-60 mesh, 120 mesh, 180 mesh, 200 mesh or 325 mesh.