Pro Penn Marathon Extra Duty Butterfly We recommend you protect the

We recommend you protect the rubber surface with rubber protective film after a match or practice

Pro Penn Marathon is the official ball of PTR because of its guaranteed longevity

RPM Blast is a premium shaped polyester string that can be devastating to your opponents

Has all the features a true touring tire should have at a top quality level - a tread for all road surfaces

Adjustable entry and release tension settings

Pro Penn Marathon Extra Duty Butterfly We recommend you protect thePro Penn Marathon is Penns 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). Penns