D'ADDARIO'S BEST SELLING PRO ARTE SET, NORMAL TENSION OFFERS BALANCE OF VOLUME AND COMFORTABLE RESISTANCE. LASER SORTED BLACK NYLON TREBLE STRINGS FOR CONSISTENT, PRECISE INTONATION. LASER SORTED BLACK NYLON TREBLE STRINGS FOR CONSISTENT, PRECISE INTONATION. PRECISION WOUND BASSES FOR WARM, PROJECTING TONE AND THE UTMOST CONSISTENCY. MADE IN THE U.S.A. FOR THE HIGHEST QUALITY AND PERFORMANCE. STRING GAUGES: TREBLES .0280, .0322, .0403 BASSES .029, .35, .043. ENVIRONMENTALLY FRIENDLY, CORROSION RESISTANT PACKAGING FOR STRINGS THAT ARE ALWAYS FRESH