Features: Make of Polyester, enduring and unthreaded. High Rotating, Abrasion Resistant, Good Toughness, Moisture resistance. Provides Maximums Ball Bite and Tension Stability. These solid racket strings offer a more comfortable hitting experience. Great for most people with minors wrist, shoulder, or elbow injuries, they bring good antishock to your game. Specifications: Materials: Polyester Styles: Black 1.3mm/Black 1.25mm/Red 1.3mm/Fluorescent Green 1.3mm Wire diameter: 1.3mm/0.051inch; 1.25mm/0.049inch Package Includes: 1Pc Tennis String note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.