These premium uncoated mandolin strings by D’Addario feature an innovative combination of nickel-plated phosphor bronze wrapped onto a high-carbon NY steel core. D'Addario Nickel Bronze strings bring out the unique tonal characteristics of any mandolin, allowing its natural voice to truly shine. Nickel Bronze strings deliver 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.