Outstanding performance:Made of natural rubber for consistent feel and reduced shock,provides unparalleled consistency every time you hit the court. Wide use: the tennis training balls are suitable for both professional training and daily exercise use, which can improve your concentration, athletic ability and hand-eye coordination, you can also use them as pet play balls and enjoy relaxing time withyour pets. Package included: you will get 2 packs of tennis training balls , enough quantity for your daily training use and replacement, you can also share them with other people. Tennis trainer equipment : practice tennis anytime, anywhere, develop your body's coordination, adjust your speed, enhance your stamina and athleticism, improve your tennis skills. Tennis training gift : best gift for friends, family or kids who like to play tennis, for backhand, forehand, topspin, downspin, overhead training, suitable for tennis courts, parks, backyards, playgrounds and many other outdoor places. Features: Tennis trainer equipment : practice tennis anytime, anywhere, develop your body's coordination, adjust your speed, enhance your stamina and athleticism, improve your tennis skills. Tennis training gift:best gift for friends, family or kids who like to play tennis, for backhand, forehand, topspin, downspin, overhead training, suitable for tennis courts, parks, backyards, playgrounds and many other outdoor places. Specification: Color: as pictures shown Ball diameter: 63.5 mm/ 2.5 inches Package included: 2 Cans, 6 Balls Note: Please allow slight size error due to manual measurement.