Alpha gypsum powder is produced by natural gypsum ore, with high strength Alpha gypsum powderWidely be used for high strength building products, pottery, coasting mould, art mould, etc, most components as building materials.High Strength Gypsum Powder for MouldSpecification: Mesh: 120meshStrength: 3. 5MPaPacking: 50kg / bag; 40kg / bag Alpha gypsum powder