Specifications: It is a unique six-sided solid silica gel ball that bounces, pops up and leaps unpredictably in different directions. It is a great training aid for developing quick reaction and fast reflexes, improve your acceleration and enhance hand-eye coordination. Practice regularly with the reaction ball will help you significantly improve your performance in all agility sports. The fun way to improve your reflexes and agility. Item Name: Reaction Ball Material: TPR Features: Hexagonal, Reflex Training, Unpredictable Size: Diameter: 5.5cm/2.17" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Reaction Ball It is a unique six-sided solid silica gel ball that bounces, pops up and leaps unpredictably in different directions. It is a great training aid for developing quick reaction and fast reflexes, improve your acceleration and enhance hand-eye coordination. Practice regularly with the reaction ball will help you significantly improve your performance in all agility sports. The fun way to improve your reflexes and agility.