Brand NEW! High quality solder for electronic and electrical work. 60% tin and 40% lead with flux in the core for a strong, long lasting bond. Diameter: .050". 1 lb. spool. Key Features ? 60% tin and 40% lead with flux in the core ? Solder for electronic and electrical work California Prop 65 Warning Significant exposures to chemicals that cause cancer, birth defects or other reproductive harm. These chemicals can be in the products that Californians purchase, in their homes or workplaces, or that are released into the environment. - All international buyers are responsible for all tax, duties and/or customs fees.