These 25pcs strings are made of high-quality polyester. They are designed specifically for yo-yo ball, which can provide a smooth yo-yo release and recycling experience. Feature: Pure polyester material with high quality. The strings are not easy to break, durable, and wear-resistant. 25pcs strings set includes a variety of bright colors strings. Designed specifically for yo-yo ball, it provides a smooth yo-yo release and recycling experience, which is convenient for you to demonstrate superb yo-yo technology. Specialized design, exquisite craftsmanship, and excellent quality. Any problem, please contact our store without hesitation. Honor to serve you. Specifications: Item name: Strings Main material: Polyester Color: Multi-colored Quantity: 25pcs(a box) Length: about 112cm/pcs Package Information: Package size: 15 * 5.3 * 2.5cm Package weight: 45g General box packing. Note: * There could be a few deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Packing List: 25 * Strings