Martin MA540T 3-Pack Authentic Acoustic Lifespan 2.0 Treated PhBrz Light 6-String Acoustic Guitar Set

3-Pack for cost savings
92/8 Phosphor Bronze -  Light  .012-.016-.025w .032w .042w .054w  Martin's patented Lifespan 2.0 treatment protects core and winding for strings that sound better longer. The next generation Lifespan 2.0 strings are engineered using a  patented technology only available from Martin, developed to protect the core wire and the wrap wire to prevent corrosion without compromising tone.

See the single set here: MA540T