Quality Material: These acoustic guitar strings are made from nylon and alloy. Each set includes 6 strings. Package contains 10 sets of strings. Guitar Strings: Acoustic guitar strings that are bright and durable, producing a clear tone with reliable performance. Suitable for All Levels of Guitarists: Whether you're a beginner or an experienced player, these strings can meet your needs. Easy to Install: The ball end design allows for easy installation on most acoustic guitars without the need for professional tools or skills. Guitar Strings Replacement: These strings are ideal for replacing old or broken strings. Suitable for use on acoustic guitars 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 Note: Please allow slight variations of 1-2cm due to manual measurement.