Hockeytrain.com Super Reaction Ball - Field Training Ball for All Athletes - Agility and Coordination Training Agility and hand eye coordination training made fun with the reaction ball Multi-directional reaction ball designed with six faces allowing unpredictable bounce direction Random bounces improve reaction time for athletes in softball, baseball, tennis, hockey and more Best if used on hard surfaces and walls such as wood, asphalt, dirt and more 3.5" rubber construction