Martin M150 Bronze 13-56
Martin M150 80/20 Bronze 13-56 MEDIUM
Martin Bronze Strings are excellent for daily use. Deep, rich bass tones and crisp, ringing trebles.
Martin 80/20 Bronze is an alloy comprised of 80% copper and 20% zinc. 80/20 bronze strings provide a very brilliant tone when they are initially put on the guitar and mellow over time.