Martin SP strings are designed with the performer in mind.

Martin SP 80/20 Bronze acoustic guitar strings are made with our highest quality bronzed steel core wire and bronze wrap wire. Our SP line of strings stands up to rigorous practice and performance schedules to deliver consistent true tone that you can count on song after song.

Set: M3050
Gauge: Custom Light Gauge: 11-15-23-32-42-52
Tension: 147.6
Package: 6 strings