Head YouTek IG Extreme Mid Plus Tennis Racquet-Unstrung This YouTek racquet is equipped with d30 and innegra, which combines different technologies to allow the racquet to adapt to every shot you hit and reduces vibration by 17%. The head size of the racquet is 100 square inches with a 24/26/23mm beam and a 16/19 string pattern. The racquet weighs 10.6 oz. unstrung and is standard length 27". The balance of the racquet is 1" HL. The grip size is 4 5/8". This racquet comes with NO cover