DUNLOP ATP Extra Duty High Altitude Tennis Ball Can

The Dunlop ATP Extra Duty High Altitude Tennis Ball Case contains 24 cans of the official ball of the ATP World Tour. The super-premium ball features HD Pro Cloth and HD Pro Core for best in class consistency and performance. The extra duty felt is designed for hard court surfaces and the Dunlop ATP Extra Duty Tennis Ball is the ball used at the Nitto ATP Finals in London. High altitude tennis balls are for use at elevations of 3,500 feet or more!