Long lasting play is now possible thanks to the Pro Penn Marathon High Altitude Extra Duty Tennis Ball, available in a convenient case for teams, clubs, and individuals. The longest lasting Penn ball to date, this one features Encore technology to give the ball 22 percent longer life while the LongPlay felt can withstand any punishment. These tennis balls are for players above 3500 elevation. This case of Marathon High Altitude Extra Duty balls contains 24 cans of three balls each for a total of 72 balls designed for maximum playability on outdoor hard courts. This ball is approved for play in both USTA and ITF competition.

The Pro Penn Marathon High Altitude Extra Duty Tennis Ball case contains 24 cans (3 balls per can- 72 balls per case).

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Ball Cases can ONLY be shipped to addresses within the Continental United States.

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.