Features: 1) Materials: soft-fired magnesium powder and calcium oxide 2) Smooth and moistened and balanced granules 3) Large hardness 4) Good disintegrable rate 5) Specifications: a) Grain size: 2.0 - 4.0mm b) Moisture content: less than 1.0% c) Hardness: more than 1.0kg/cm2 d) Disintegrable rate: more than 90% e) C-MgO: more than 65.0% f) CaO: 10 - 12% g) Appearance: light yellow