Quality Material: These acoustic guitar strings are made from high-quality nylon and alloy. Each set includes 6 strings, and the package contains 10 sets. Guitar Strings: Designed for acoustic guitars, these strings deliver bright, clear tone with excellent sound performance. Suitable for All Levels of Guitarists: Ideal for beginners, intermediate, and professional players seeking reliable string quality. Easy to Install: Features a ball end design for secure and straightforward installation on most acoustic guitar models, no professional tools or skills required. Replacement Guitar Strings: Perfect for replacing old or damaged strings, these strings are compatible with acoustic and folk guitars. Specification: Material: Nylon and Alloy Diameter: 0.71mm, 0.81mm, 1.02mm, 0.76mm, 0.89mm, 1.09mm Package Includes: 10 sets of 6 guitar strings (60 strings total) Note: Slight variations of 1-2cm may occur due to manual measurement.