High quality: The reaction ball is made of solid, , high-density material and is composed of six hemispheres to create dynamic and unpredictable bounces. It is suitable for all hard surfaces, including grass, wood, asphalt, clay, and even dirt. Instant feedback. Reaction Ball provides you with a perfect analysis of player and ball participation, and you can get immediate reaction time feedback. This 6-sided high elastic rubber ball can jump and -out randomly, allowing players to keep their toes. Advantages: The reaction ball is an excellent equipment. Through group exercise programs and personal training, it can enhance the hand-eye coordination and reaction time ability. Suitable for all kinds of sports, including baseball, football, football and basketball training. colour:Random color (specified colors cannot be ) Material:rubber size:5.5 x 5.5 x 5.5CM Package Contents: 6 x reaction training balls Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.