the Pro Penn Marathon Extra Duty is an excellent choice

No wires to rust

and tournaments

Anatomical Cushioning System provides superior cushioning and directs energy where your heels need it most

Keep your racquets in tip top shape by making sure your machine is accurate with Gamma's Tension Calibrator

Wilson NXT Power 17 Overgrip Type_Absorbent the Pro Penn Marathon ExtraUnleash the power in your swing when you string your tennis racquet with Wilson NXT Power 17. This tennis string is constructed with high crystallinity Xycro Micro fibers processed for ideal feel and power. Infused with a PU core. Wilson 2014 String Guide Click here for clarification on name changes and new products.