The Wilson US Open High Altitude tennis ball is the official ball of the US Open since 1978. The US Open tennis ball is made with exclusive felt from Tex Tech Industries for superior playability, consistency, and durability. The standard felt is made for use on all surfaces for maximum versatility for players above 3500 elevation. The Wilson US Open ball is also available in Wilson US Open Extra Duty tennis ball for hard courts, Wilson US Open Regular Duty tennis ball for clay or indoor courts, or Wilson US Open Grass Court tennis ball with white felt for grass court surfaces. The Wilson US Open tennis ball is both USTA and ITF approved.

The Wilson US Open High Altitude case contains 24 cans (3 balls per can- 72 balls per case).

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SPECIAL: Get Free Ground Shipping with the purchase of 10 or more cases of Wilson Tennis Balls. Continental US only. Questions call 713-435-4807.

Note: Due to the size of this item it does not qualify for free 2nd Day Air shipping. Fee is $10.95 and will be Standard ground shipping.