Martin MA140 SP Acoustic Guitar Strings, 80/20 Bronze, Light, 12-54
Martin MA150 SP Acoustic Guitar Strings, 80/20 Bronze, Medium, 13-56
Martin MA240 SP Acoustic Guitar Strings, 80/20 Bronze, Bluegrass, 12-56
Martin MA540 SP Acoustic Guitar Strings, Phosphor Bronze, Light, 12-54
Martin MA550 SP Acoustic Guitar Strings, Phosphor Bronze, Medium, 13-56
