Contains 35 feet (420 inches) of 0.02" diameter solder wire. It is lead free, no cadmium, silver solder containing and formulated to contain 96% SN (tin)  and 4% Ag (Silver). Manufactured by Kester. Part number 020-QQS571E. Great for Jewelry repair, Stained Glass, crafts, electronics, copper pipe and tube repair, Safe for water systems and potable water systems. Item is bulk packed and ready to use.