Martin Authentic Treated Acoustic Lifespan 2.0 Guitar Strings 92 8 Phosphor Gauge:Medium 13 56 Tone control adjusts balance between Pickup Alnico zebra coil Tone control adjusts balance between high and low frequencies A1 Suicide's An Alternative You'll Be Sorry A2 Two Sided Politics A3 I Shot The Devil A4 Subliminal A5 Won't Fall In Love Today A6 Institutionalized B1 Memories Of Tomorrow B2 Possessed B3 I Saw Your Mommy Available in 80 20 Bronze and 92 8 Phosphor Bronze This technology was developed to protect the core wire and the wrap wire to prevent corrosion without compromising tone the single most important attribute of the guitar strings