Features: 1) Material: natural magnesium sulfate 2) High soluble speed in water 3) Clear solution 4) Suitable for leaf and lawn spraying, without residue 5) Specifications: a) Grain size: 2.5 - 4.0mm b) Moisture content: less than 10.0% (1), 2.0% (2) or 1.0% (3) c) Hardness: more than 2.0kg/cm2 (1, 2) or 1.0kg/cm2 (3) d) W-MgO: 21.0% - 24% (1), 24.0% - 26% (2), 26.0% - 28% (3) e) Appearance: grey (1), white (2, 3)