D'ADDARIO'S MOST POPULAR ACOUSTIC GAUGE, IDEAL BALANCE OF TONE AND PLAYABILITY. BRIGHT, LONG LASTING ACOUSTIC TONE, IDEAL FOR ALL MUSICAL STYLES. BRIGHT, LONG LASTING ACOUSTIC TONE, IDEAL FOR ALL MUSICAL STYLES. ENVIRONMENTALLY FRIENDLY, CORROSION RESISTANT PACKAGING FOR STRINGS THAT ARE ALWAYS FRESH. MADE IN THE U.S.A. FOR THE HIGHEST QUALITY AND PERFORMANCE. STRING GAUGES: PLAIN STEEL .011, .015, BRONZE WOUND .024, .032, .042, .052.