... -Tin,Silver-Copper-Zinc-Cd,Copper-Zinc,Aluminum base copper welding rods / brazing rods / solder rodsPhos-copper ,Phos-Copper-Silver , ... characters of easily-flowing,low cost,and perfect welding effect.Needn't to use flux when brazing copper and silver objects,the ... phosphorus,has better plastic nature,a little higher melting point.Use for copper and copper alloy parts,suitable for air conditioning ...