The official ball of the AO, Australian Open, usable on all tournament events including finals, the Dunlop Australian Open tennis balls - 6 dozen are designed for competitive, tournament level of play, and to suit the style of tennis presented by the world-class players participating in the most prestigious tourneys in tennis. The ball provides excellent responsiveness and bounce with the HD core, as well as incredible feel and visibility with the HD Pro cloth. It preserves playing characteristics for longer on all playing surfaces throughout countless tennis sessions, including consistency and shot sensation, and it’s supplied in a large bundle – a 6 dozen set.