Prince o3 Speedport Black, Grip Size 4 3/8 Ideal for players looking for some extra power and mobility without sacrificing control and placement. Features the first true 'tweener offering in the Prince O3 Speedport racquet line. New square-shaped O-Ports that generates a livelier response across the entire string bed. The string PORT insert provides a softer, more-damped feel, while the string HOLE insert resembles a traditional grommet that provides more feel and feedback from the stringbed. Sure to be one of the best all-around racquets for an intermediate to advanced player with a moderate to fast swing speed.