Features : Reflection builder: Designed to bounce randomly, so athletes can enhance their hand-eye coordination and improve reaction time. Train with the Reaction Ball to prepare for any sport: Athletes honing their skills to perform in baseball, softball, football, soccer, or hockey games can decrease their reaction time, improve alertness, and enhance agility. Solo or partner training: Train solo by throwing the reaction ball against a wall or work with a partner to create drills with unexpected flight paths. Silicone material: The ball is made of highly durable, long-lasting silicone Fun: Not only is this item a great way to train for all sports, but it's also an entertaining way to play with your dog, kids, or friends. Notice: Actual color may be slightly different from the image due to different monitor and light effect Specification : Diameter: 5.5-7.0cm Weight: 120g Color: green, blue, yellow, red, pink includes: 1 x Random-Bounce Agile Training Ball