The Champion Sports Intermediate Rubber Basketball is a good choice for junior players and is also the official size for women's high school, college and pro basketball. Built with a composition rubber cover, this intermediate basketball has a heavy duty construction that will stand up to regular use on indoor or outdoor courts. The nylon 2-ply butyl bladder offers exceptional air retention, so you can spend more time playing and less time inflating the ball. Composition rubber cover. Nylon wound 2-ply butyl bladder for maximum air retention. Heavy-duty construction. Intermediate size 6 & weight. Diameter: 28.5", Orange. Sold as a pack of 3 Basketballs.