8 OZ 95/5 Acid Core Solder, 95% Tin, 5% Antimony, Lead Free High Strength Alloy Exhibits Excellent Creep Resistance, Used Where Frequent & Extreme Temperature Changes & Vibrations Occur Such As Refrigeration Lines, Cooling Equipment, Etc, Narrow Melting Range, Acid Flux Is Contained In The Wire Core, No External Flux Is Necessary.