The official tennis ball of the Australian Open Grand Slam, this ball features a HD Core, which is a remastered version of the classic Dunlop Forte Core that is designed to play even more consistently and with greater durability. Dunlop has also added HD Pro Cloth to this ball, a premium felt engineered for the highest level of play. Players of all levels looking for the highest quality ball will be satisfied with this option from Dunlop. Suitable for all court surfaces and the extra duty felt makes it a great choice for hard court play. 24 cans per case, 3 balls per can. Dunlop is also the Official ball brand of the USPTA.