Intended for functional resistance training exercises of varying difficulty for any fitness, sport, or rehabilitation application. This is the perfect ball for exercises such as wood chops, overhead throws and much more. Also available in: 4, 6, 8, 10, 12, 15, 17, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80 lbs We have ones without the tire tread up to 150lbs Call for pricing & to check stock