ProPenn Marathon Extra Duty Tennis Ball Case (72 balls) meta-exclude Extend BG Eyelets: Wider and

Extend BG Eyelets: Wider and longer eyelets enable strings to “breathe

and superior control

Sometimes we don’t want to choose between reach

Pre-strung: No

ProPenn Marathon Extra Duty Tennis Ball Case (72 balls) meta-exclude Extend BG Eyelets: Wider andPro 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