Features: Make of Plastic materials, light weight and enduring, feel comfortable, and can used for a long terms. Wear racquet rackets can seriously affect not only the service life of the racket, but also the quality and balance of the racket. Use these tube to your racket. Simple operate, not too many tedious steps. Compact size, portable and easy to store, doesn't take up too much space. Easy to use and fine workmanship. Without any difficult requirement even though you use it for first time. Specifications: Materials: Plastic Size: 4x35mm (0.16x1.38 inch)/4x15mm (0.16x0.59 inch)/3.6x35mm (0.14x1.38 inch)/3.6x15mm (0.14x0.59 inch)/3.2x15mm (0.13x0.59 inch)/3.2x25mm (0.13x0.98 inch) Package Includes: 1set Tennis Racket Grommets 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.