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0.1-1mm Magnesium Sulfate Heptahydrate Seven Water Magnesium Sulphate Mgso4.7H2O. Versatile Applications: Used in fertilizers, printing, dyeing, fermentation, and animal feed additives. Essential Nutrient Source: Magnesium and sulfur are key elements for chlorophyll and enzyme activation. Professional Quality Control: Inspections conducted every 2 hours with acceptance of third-party testing. Large Production Capacity: Annual output of 300,000MT with multiple specialized production lines. Fast Shipping Time: Shipping arranged within 20 days after order confirmation. OEM Service Available: Custom design bags accepted for OEM orders.