Therapist's Choice Reaction Ball for Improving Agility, Reflexes and Hand-Eye Coordination Skills Therapists Choice 2.5" Diameter Reaction Ball is designed to bounce unpredictable and train athletes to react to the unexpected Used to develop quick reaction for players of any sport The Fun way to improve your reflexes and agility Promote coordination of eye/hand and rapid reaction. Made from TPR, phthalates free, latex free.