D'Addario's heaviest premium uncoated mandolin string set that provides a crisp and clear sound to accentuate the unique tone of your mandolin. NBM11541 delivers the increased tension for maxium volume. Loopend construction for universal fit. Nickel Bronze strings are the premium uncoated mandolin strings by D’Addario. Featuring an innovative combination of nickel-plated phosphor bronze wrapped onto a high carbon NY steel core, these strings bring out the unique tonal characteristics of any mandolin, allowing its natural voice to truly shine. Nickel Bronze delivers unrivaled clarity, resonance and projection, as well as outstanding balance and harmonically rich overtones. Players will also enjoy improved tuning stability and higher break resistance, thanks to D’Addario-engineered NY Steel cores and plain steel strings.