Specification: Al2O3; 15. 8% min: Fe: 0. 5% max; PH: 3. 0min; Water Insolubles: 0. 15% max. Grain size: 15mm max (Flakys) Use: : Used in papermaking, printing and dye, tanning leather, fire-fighting equipment, drug and wood preservation, etc. Packing: PP / PE 50kg / bag