The Fitness Mad Reaction Ball Small is a great way to improve agility, hand-eye co-ordination and reaction times. Designed with a bumpy surface, this reaction ball is intended to bounce in an erratic and unpredictable way. All you have to do is throw the ball against a wall and then catch it. It can be used on your own or with a partner. Measuring 7cm in diameter and weighing 60g, the reaction ball is easy to transport and store and is a great training tool for all ball sports.