The Dunlop Sports Australian Open AO Extra Duty Tennis Balls are the official balls used in the prestigious Australian Open Grand Slam, making them a top choice for tennis enthusiasts and professionals alike. Each case includes 24 cans, totaling 72 high-quality tennis balls designed to deliver exceptional performance and durability. These tennis balls feature the innovative HD Core, an upgraded version of the classic Dunlop Fort Core, providing enhanced consistency and longevity. Additionally, the HD Pro Cloth, a premium felt, ensures optimal playability at the highest levels of competition. Suitable for all court surfaces, these extra duty tennis balls are particularly ideal for hard courts due to their robust construction. The endorsement by the ATP Tour further underscores their superior quality.Players of all skill levels will appreciate the reliability and performance of these tennis balls. Whether you're practicing your serve or competing in a match, Dunlop Sports Australian Open AO Extra Duty Tennis Balls will meet your needs with excellence.Key Features:- One case includes 24 cans, each containing 3 balls.- Officially endorsed by the ATP Tour and used in the Australian Open Grand Slam.- Features HD Core for consistent play and increased durability.- Equipped with HD Pro Cloth for premium feel and performance.- Suitable for all court surfaces, particularly hard courts due to extra duty felt.Choose Dunlop Sports Australian Open AO Extra Duty Tennis Balls for your next game and experience the difference in quality and performance.