gsi bounce reaction balls for agility reflex and coordination training (72 mm) (pack of 1) gsi gsi training reaction balls are 100% brand new and high quality. gsi reaction ball is made of robust, durable, high-density rubber and consist of a six-hemisphere design creating dynamic and unpredictable bounce. gsi reaction balls are usually available in a varying size of 72 mm (7 cm) or 102 mm (10 cm) so that you can customize your regimen for a wide variety of drills. gsi reaction balls offer high visibility and come in bright fluorescent colors such as orange, red, blue, green and yellow. reaction ball, also known as reaction training ball and reflex ball, has six rounded sides to make it bounce unpredictably and in zigzag motions. reaction balls are used by athletes to catch the ball bouncing quickly and in many different directions after being bounced against a wall, on the floor or grass field. reaction agility ball is excellent equipment for enhancing one’s hand-eye coordination, reaction timing, and agility. it serves as a great training tool for sports which require good reflexes like tennis, baseball, badminton, basketball, and cricket. football players must use quick feet to trick the opponent charging towards him. tennis players often change direction mid-swing. basketball players switch up their dribbling path to outsmart the opposing players. no matter your sport, having agility and quickness can be the determining factor in winning or losing. gsi offers a wide variety of agility training equipment to help you develop optimum speed and quickness. gsi is a renowned manufacturer of sports training and fitness equipment from india since 1990. from agility ladders to training hurdles to over-speed and resistance trainers, we've got what you need! what we do is have a range of high quality, innovative products that are excellent for their intended purpose. want to improve your speed and quickness? buy from gsi and make an excellentchoice.