We are the supplier at shandong ,china ,where is the mainly source offeed agri feed rawmeterals in china and the production base of world , we have in this field for many years .we are writing here to hope we can make a good cooperation in the near future . our products had aranged bellow: 1. vitamine: choline chloride 50% /60% /75%... 2. mineral feed: dicalcium phosphate /mono-dicalcium phosphate /monocalcium phosphate etc... ; 3. trace element: ferrous sulfate / zinc sulfate /copper sulfate /manganous sulfate . .. if need more information about our products,please mail me back directly. our website: www.fanobiotech.com reference clients:provimi ,globel fine chemicals spefication wiil be given after require.