Strap this weighted exercise ball onto the hands, arms, or legs to perform strength and functional training movements. Velcro straps adjust to fit most users and can be removed for more traditional medicine ball exercises. Ideal for rehab and elderly clients. Hollow synthetic rubber construction allows balls to bounce. 2 lb. to 4 lb. = 8" diam. 6 lb. to 12 lb. = 9" diam. Color coded by weight; colors may vary. 3-year limited warranty.