ETSNA RSH5SET 5 Inch Rhino Skin Sting Free Ball Set Versatile enough for any Phys. Ed. class or playground game, the Champion Sports Rhino Skin® Sting Free Ball Set includes six foam balls with a sting-free design to prevent pain and injuries when players get hit with the ball. A hollow hole pattern and hollow core make these balls lightweight and well-balanced for true flight. As well, the Rhino Skin® coating offers exceptional tear-resistance as well as being easy to clean, making it suitable for indoor games in the gym or outdoor games on the pavement.