NYXL’S FEATURE D’ADDARIO’S EXCLUSIVE NEW YORK MANUFACTURED, HIGH CARBON STEEL ALLOY FOR UNPRECEDENTED STRENGTH – PLAY FEARLESSLY. IMPROVED TUNING STABILITY COMPARED TO TRADITIONAL NICKEL WOUND STRINGS - GET IN TUNE FASTER, STAY IN TUNE BETTER. IMPROVED TUNING STABILITY COMPARED TO TRADITIONAL NICKEL WOUND STRINGS - GET IN TUNE FASTER, STAY IN TUNE BETTER. WOUND STRINGS WITH ENHANCED MID-RANGE FREQUENCY RESPONSE IN THE 1 - 3.5 KHZ RANGE – MORE PRESENCE AND CRUNCH TO CUT THROUGH THE MIX. NYXL0940BT BALANCED TENSION SETS ALLOW FOR EVENLY BALANCED BENDING, STRUMMING, FRETTING, PICKING, AND PLUCKING: PLAIN STEEL .009, .012, .015, NICKEL WOUND .022, .030, .040. ENVIRONMENTALLY FRIENDLY, CORROSION RESISTANT PACKAGING FOR STRINGS THAT ARE ALWAYS FRESH.