Alloy of tin, silver, copper and bismuth. Meets requirements of Safe Drinking Water Act for use on copper potable water lines. Provides excellent flow and fill characteristics. 420 to 460 degrees Fahrenheit melting range. Includes 1/4 lbs. solid wire solder 0.117" diameter, 1.7 ozs. No.95 lead free tinning flux, acid brush, sand cloth, and how-to instructions.