The spec is : Our specification is : NACL 98.00% MIN CALCIUM (CA) 0.20% MAX MAGNESIUM (MG) 0.10% MAX SULPHATE (SO4) 0.60% MAX WATER INSOLUBLE 0.30% MAX MOISTURE 4.00% MAX Quantity : 30,000MT per month every month. Package : Loose bulk Payment : 100% Irrevocable L/C at sight with documentation