Features: Tennis Crosses string saver is make of Silicone, light weight and enduring. Tennis Crosses string saver can extend life of your strings. Tennis Crosses imparts more spin when balls is strikes. Easy To Use: Reduces string movement by locking strings in place. Applicator tool makes it easy so that you can insert the Crosses part with one hand. Convenient to take it with you. Increased sweet pots and roughness for better control and balls spin. Suitable for badminton racket, tennis racket, squash racket. Specifications: Materials: Silicone Color: Redness/White/Black/Blue Size: about 12x3x1cm/4.72x1.18x0.39inch Package Includes: 1Pc Tennis Crosses String Saver 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.