The Li-Ning AP66 Rainbow string is a high-performance choice, carefully designed for players who require exceptional durability and repulsion. It has a High-Tensile Elastic Multifilament Core that improves the string's elasticity and responsiveness, while the Nylon Monofilament Outer layer provides strength. The revolutionary Nano-Tec Coating reduces vibration while providing the perfect control, ensuring precision and power with every shot. This string can withstand pressure ranging from 24-26 lbs and offers outstanding repulsion, great shock absorption, and long-lasting durability, making it ideal for competitive play and high-tension stringing needs.