Uses:1) The products are made from high quality raw materials2) Sintered at high temperature in the tunnel kiln3) It's highly consistent in quality, and can be widely used in the production of refractory products with high thermal-shock resistance, and anti-corroding ability for metallurgy, construction and glass industries4) The products hold features of fine crystals, stable contraction and perfect fluidness Specifications: MgO (%): 22-49 SiO2 (%): 0.35 Al2O3 (%): 49-76 Bulk density (g/cm³): 3.15 min. Size (mm): 0-30 Note: every specification can be discussed as per customer's options. Packing:In bulk or in 1,000kg bags