D'Addario NB1047 Nickel Bronze Acoustic Guitar Strings, Extra Light, 10-47 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. NB1047 are ideal for beginners or players who prefer a softer tone and easy bending. String Gauges: Plain Steel .010, .014, Nickel Bronze Wound .023, .030, .039, .047