Martin Guitars Authentic Acoustic SP 92/8 Phosphor Bronze Strings Promo Pack - 12-54 Light

Authentic Acoustic Superior Performance Strings
Martin Authentic Acoustic Superior Performance SP strings feature higher tensile strength and tin-plated core wire on all six strings that enable a fuller and more balanced tone, quicker response and increased tuning stability.
This Promo Pack includes 3 sets of 12-54 Light strings.

Specifications
Gauge: Light
E: .012
B: .016
G: .025
D: .032
A: .042
E: .054
Tension: 168.5