D'ADDARIO'S LIGHTEST GAUGE OF FLATWOUNDS DELIVERS SMOOTH FEEL AND WARM, MELLOW TONE WITH MINIMUM TENSION-. RIBBON WOUND AND POLISHED FOR ULTRA-SMOOTH FEEL AND WARM, MELLOW TONE. RIBBON WOUND AND POLISHED FOR ULTRA-SMOOTH FEEL AND WARM, MELLOW TONE. 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 .010, .014, STAINLESS STEEL FLAT WOUND .020, .028, .038, .048.