The Champion Sports Mini Rubber Basketball is an ideal size for giving young children their first introduction to the sport. This size 3 mini basketball features a tough composition rubber cover that can stand up to both indoor and outdoor use, and it has an airtight 2-ply butyl bladder with nylon winding for superior shape retention. Durable composition rubber cover. Nylon wound 2-ply butyl bladder provides superior air retention. Heavy-duty construction for longer life. Mini Size 3. Orange. Sold as a pack of 3 Basketballs.. Durable composition rubber cover. Nylon wound 2-ply butyl bladder provides superior air retention. Heavy-duty construction for longer life. Mini Size 3. Pack of 3. 5+ years. Grade K+