We are supplying comprehensive raw materials of welding flux. The specs for fluorspar is showed as below:CaF2: 96.0% min SiO2: 2.0% max Fe2O: 3.0% max S: 0.03% max P:0.03% max SIZE: -100MESH/-120MESH/-200MESH or according to customer's requirement Packing: In 1000kg big bag or according to customer's requiremen