HEAD Micro Gel Radical OS Tennis Racquet (Strung) On ball impact, Head Micro Gel uniformly distributes the impact load around the frame to provide a rock-solid feel and unique touch The head size of the racquet is 107 square inches The beam of the racquet is 21mm The string pattern of the racquet is 18x19 The racquet weighs 10.4 oz and is standard in length at 27"