The Yamaha FS50BT Acoustic Guitar String Set is a premium quality set of light gauge strings featuring brass wound construction and anti-rust coating. These strings are specifically designed for acoustic guitars to deliver reliable performance and durability. Key features: • Light gauge strings (.012 - .052) • Brass wound construction • Premium anti-rust coating • Made by trusted brand Yamaha • Designed for acoustic guitars These strings are manufactured to Yamaha's high quality standards and feature specialized anti-rust coating to extend their lifespan and maintain tone quality. The light gauge makes them ideal for players who prefer easier fretting and a brighter tone. The brass wound construction provides balanced sound with good projection and sustain.