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. 415 to 455° Fahrenheit melting range. Includes 1/4 lbs. solid wire solder 0.117 in diameter, 1.7 oz No.95 lead free tinning flux, acid brush, sand cloth, and how-to instructions.