Magnesium Sulphate, Ferrous Sulfate, Magnesium Chloride manufacturer / supplier in China, offering White Crystal Size0.1-1mm/Size2-4mm Magnesium Sulphate Heptahydrate Used in Agriculture, White Crystal Water Soluble Magnesium Sulphate Heptahydrate Size0.1-1mm/Size2-4mm, Agriculture/Industry Grade Purity 99%Min Magnesium Sulphate Heptahydrate and so on.