D'Addario NB1152 Nickel Bronze Acoustic Guitar Strings, Custom Light, 11-52 Nickel Bronze strings are the premium uncoated acoustic 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 guitar, allowing its natural voice to truly shine. NB1152 is a comfortable compromise for players who want the depth and projection of light gauge bottom strings, but slightly less tension on the high strings for easy bending. String Gauges: Plain Steel .011, .015, Nickel Bronze Wound .022, .032, .042, .052