Pro Penn Marathon is Penn’s longest lasting tennis ball featuring exclusive Encore Technology for a 22% longer lasting core and high tenacity LongPlay Felt for extended play. Pro Penn Marathon is the official ball of PTR because of its guaranteed longevity, durability and visibility. Pro Penn Marathon is available in Extra-Duty Felt (for hard courts), Regular-Duty Felt (for soft courts) and Extra-Duty High Altitude (for higher altitudes).
Pro Penn Marathon Tennis Balls - 1 Dozen – Sweatband
ProPenn Extra Duty Tennis Balls Can, 3 Balls - Cayman Sports
Penn Championship is America's #1 Selling Tennis Ball and represents the standard by which all other tennis balls are measured. It features a controlled fiber release for consistent nap natural rubber for consistent feel and reduced shock and interlocked wool fiber for longer wear. Penn Championship is the Official Ball of USTA Leagues. It is USTA and ITF approved and is available in extra-duty felt regular duty felt or extra-duty high altitude felt.
Penn Championship Regular Duty Tennis Ball Case Pack, 12 Cans, 36 Balls
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6 Dozen Penn 522102 Pro Series Yellow Marathon Regular Duty Felt
The Pro Penn Marathon is Penns longest lasting tennis ball. Features Encore Technology for 22% longer lasting core, high tenacity LongPlay felt for
Pro Penn Marathon Regular Duty Tennis Balls (Case)
Pro Penn Marathon Extra Duty Tennis Ball Review
Pro Penn Marathon Regular Duty Tennis Balls - 3 Can - Of Courts
6 Dozen Penn 522102 Pro Series Yellow Marathon Regular Duty Felt