Reflex Training and Improved: This reaction ball is designed to bounce randomly to improve athletes' reflexes, hand-eye coordination, responsiveness, reaction time, and agility. Versatile for Any Sports, Including Baseball: The six-sided high-bounce rubber construction allows the ball to leap and hop in an unpredictable manner, making it a perfect training tool for high-energy, multi-sport training and warm-ups. Use with a Partner or for Solo Training: These agility balls can be used between players or rebounded against a wall for individual practice. The ball works on all hard surfaces such as walls, grass, concrete, and turf. Reliable and Consistent Bounce: The coordination ball is made of rubber for excellent bounce performance and durability. Easy to Clean: Enjoy active play with your kids, friends, and dogs. Color: Random color; specific color requests cannot be accommodated Material: Rubber Size: 5.5 x 5.5 x 5.5 cm Package Contents: 4 x Reaction Training Balls Note: Only the items listed above are included. Other products are not included. Note: Lighting and display differences may cause the color of the item in the picture to vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.