Black Diamond 550M Nickel Round Wound Medium 5 string
Natural Uncoated is exactly that. Our original and natural Black Diamond strings. The core is the pulse of our string. It’s the heartbeat. We pull our high-carbon steel core to the optimum playing tension on our custom-made machines before winding the NPS8 Nickel wrap at 8,000 rpm with 35% braking tension while at a -1 pitch. This produces a string that opens up smoother while still retaining great sustain and volume. Since 1890
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