BOWE FB305 silver brazing paste (flux paste), This is a kind of silver brazing flux , this product for ivory toothpaste shape is the sticky canned products,  accord with ROSH standard, it's good fluidity than all other  similar flux . The solder applies: Cooperate with silver, copper brazing material, metallurgical in 550℃ - 900 ℃ between brazing copper and copper alloy, stainless steel, hard alloy etc. Various ferrous metal.