Nike Women's Vapor Lite 3 Hard Court Tennis Shoes in Pale Ivory Tattoo Vachetta Tan sale_apparel_kid Long lasting play is now Extended String Hole technology Long lasting play is now possible thanks to the Pro Penn Marathon Extra Duty Tennis Ball available in a convenient case for teams clubs and individuals The longest lasting Penn ball to date this one features Encore technology to give the ball 22 percent longer life while the LongPlay felt can withstand any punishment This case of Marathon Extra Duty balls contains 12 cans of three balls each for a total of 36 balls designed for maximum playability on outdoor hard courts This ball is approved for play in both USTA and ITF competition increased spin potential Product details plant and sprint back into position without feeling like you're rounding off your cuts