US Open High Altitude Tennis Ball Case

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). For more information on tennis balls, check out the following blogs: Every Different Type of Tennis Ball Finding the Right Tennis Ball Machine for Your Game Note: This item has an additional shipping fee of $10.95 and ships ONLY to non-PO Box addresses within the Continental United States. We recommend selecting Standard Ground Shipping for orders containing pressurized tennis balls because Express Shipping risks depressurizing the tennis balls.