We are supplying comprehensive raw materials of welding flux. The specs for fluorsparshow as below: CaF2 (% min): 95SiO2 (% max): 5Fe(% max): 3.0CaO (% max) : 1.0S (% max): 0.03 P (% max):0.03 SIZE: -100MESH/-120MESH/-200MESH or according to customer's requirementPacking: according to customer's requirement. producing area:China