BLACK NYLON TREBLES. BALL-ENDS ON EACH STRING TO ACCOMMODATE A VARIETY OF GUITARS, EASY STRING CHANGING. BALL-ENDS ON EACH STRING TO ACCOMMODATE A VARIETY OF GUITARS, EASY STRING CHANGING. SILVER-WOUND BASSES. ENVIRONMENTALLY FRIENDLY, CORROSION RESISTANT PACKAGING FOR STRINGS THAT ARE ALWAYS FRESH. MADE IN THE U.S.A. FOR THE HIGHEST QUALITY AND PERFORMANCE.