Head Micro Gel Challenge MP Strung Tennis Racquet without Cover 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 100 square inches The beam of the racquet is 24/26/23.5mm The string pattern of the racquet is 16x19 The racquet weighs 9.5 oz and is standard in length at 27"