D'Addario's premium uncoated acoustic string set that provides a crisp and clear sound to accentuate the unique tone of your guitar. NB1656 delivers the ideal balance of volume, projection and comfortable playability for your Resophonic guitar. Delivers a full tonal spectrum, revealing the unique tonal qualities of your acoustic guitar. Features D'Addario's exclusive high-carbon NY steel for unprecedented strength and tuning stability. Environmentally-friendly, corrosion-resistant packaging keeps strings fresh. String Gauges: Plain Steel .016, .018, Nickel Bronze Wound .028, .035, .045, .056