Pro Penn Marathon Extra-Duty balls feature Penns exclusive Encore Technology for a 22% longer lasting core. Ideal for hard courts, this ball also incorporates LongPlay Felt for extended play and features SMART OPTIK felt for enhanced visibility over standard tennis balls. A best seller for many years, Pro Penn Marathon Extra-Duty tennis balls are technologically advanced and offer outstanding performance and durability.

Pro Penn Marathon Extra Duty Tennis Balls Details:

• 3 Balls per Can
• Courts: Hard
• Felt:Extra Duty
• Colour:Yellow
• United States Tennis Association Approved
• International Tennis Federation Approved
• Product Code: 525042