Martin Era MJI12T Jason Isbell Premium Treated Guitar Strings - Artist Light 12-54

This brand new Martin guitar accessory will ship insured and inspected from Rapid City, SD.

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Developed in collaboration with six-time GRAMMY-winning Americana artist Jason Isbell, the Martin Era MJI12T Artist Light strings are built for tone-first players who demand performance, longevity, and vintage-inspired details. Designed to match Isbell’s signature acoustic sound, this set features a more traditional SP core that delivers rich lows, articulate highs, and an expressive dynamic range.

Martin Era strings combine decades of innovation with handcrafted attention to detail. The high-tensile tin-plated core wire is treated with Martin’s patented Lifespan technology for outstanding corrosion resistance and extended tone life. Flexible Core construction enhances playability, reducing finger fatigue while maintaining a full, bold voice. Each string is finished with Martin’s signature red “Marquis” silk-wrapped ball ends — adding a touch of elegance and helping protect your bridge and endpin from wear, especially on vintage guitars.

Whether you're in the studio or out on tour, Martin Era MJI12T strings are crafted to deliver consistent tone from your first chord to your last. Available now at Haggerty’s Music.

Features / Specs

• Model: MJI12T
• Series: Martin Era
• Signature Artist: Jason Isbell
• Wrap Material: Phosphor Bronze
• Core Type: SP Core (Traditional Steel)
• Coating: Lifespan Patented Treatment
• Construction: Flexible Core
• Ball End: Red Silk-Wrapped “Marquis” Ends
• Gauge Title: Artist Light
• Gauges: .012, .016, .025, .032, .042, .054
• Tension: 168.5 lbs
• Recommended Use: All Acoustic Steel-String Guitars
• Made In: USA