If you're looking to brighten up that acoustic tone, Fender 80/20 bronze strings deliver articulate sound and great feel, making them perfect for an acoustic guitar with a naturally dark tone. Made from 80% copper and 20% zinc, these strings will not only bring your acoustic sound to life, but also last throughout the most enduring performances. 70XL: .010, .014, .022, .030, .040, .048 70L: .012, .016, .024, .032, .042, .052 70CL: .011, .015, .023, .032, .042, .052 70M: .013, .017, .026, .036, .046, .056 · Material: 80% Copper/20% Zinc · Instrument Type: Acoustic Guitar