Quick unpredictable reaction balls allow you to hone your reaction times, improve hand/eye coordination and sharpen your reflexes.Throw it on the floor or against a wall, watch it bounce and react to improve your speed, agility and catching skills & also improve your sense of balance and proprioception.Manufactured to high standards from hard wearing Thermoplastic Elastomer Rubber (TPR), these are versatile, with portability, practicality and easy storage in mind.The non-marking rubber balls are ergonomically designed to be comfortable to hold and catch and are a great additional tool to throw into your existing sports based conditioning and training workout programme. Irregular shaped, they may also used as a trigger point massage tool!Use alone, in twos, or in a group training environment, & form an invaluable part of reflex/agility training like many sports professionals in soccer, hockey, cricket, tennis, squash & even martial arts etc. Diameter: 55mm (SMALL) Colour: yellow, blue, green, pink