The yonex vcore duel g 100 lg tennis racket is best suited for players seeking controllable power as well as an excellent feel and plenty of spin with a head size of 100in2 645cm2 the racket gives you a great level of control and boasts yonexs signature technology called tough g fiber providing high repulsion for a heavier and powerful spin the lock booster system further improves spin potential whereas black micro core technology increases face stability and reduces unwanted vibrations