Plyometric Rebounder Ball 4 lb. Red 5 Diameter Exam Tables Full Cabinet XXX Large * Fits knee circum Color:Yellow XXX Large * Fits knee circum Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red green blindness each in two forms complete and incomplete * Includes four special plates for tests to determine the kind and degree of defect in color vision * Makes use of the peculiarity that in red green blindness blue and yellow appear remarkably bright compared with red and green * Color plates encased in specially designed album type books for ease of handling * Detailed instructions included Unique texture is easy to grip grasp and throw * Softness of ball enhances grasp * Balanced uniform weight * Use for upper body rehabilitation and fitness exercises * Designed to throw against plyometric rebounders * Color coded to easily identify weight