Material: Strings 1-3 are nylon, strings 4-6 are silver-plated copper wound on nylon. Gauge: String 1: 0.76mm, String 2: 0.91mm, String 3: 1.12mm, String 4: 0.71mm, String 5: 0.81mm, String 6: 1.02mm This is a set of strings for a classical guitar, made in China. How about using them for practice? Available for an additional 280 yen per set. Please consult before purchasing if you wish to purchase. Shipped via anonymous delivery. If you purchase other items that can be shipped together, we will discount the shipping cost. If you need multiple sets, please consult before purchasing.