Another 23+ Martin M150 80/20 Acoustic Guitar Strings, Medi...
Another 23+ Martin M150 80/20 Acoustic Guitar Strings, Medi.... Made from tin plated steel core wire and bronze wrap wire. Medium gauge martin acoustic 80/20 bronze guitar strings feature bronzed steel core wire with 80/20 bronze wrap wire for a brighter tone than phosphor bronze. Tried and true, they are designed to deliver consistent quality and tone with every set. Martin m150 medium gauge bronze wound acoustic guitar string set.