Yonex VCORE Si 100 Lite Tennis Racquet Color: flash orange; head size: 100Sq.In; weight: 280g/9.9oz; length: 27in; material: H.M. Black micro core nanometric; stringing pattern: 16/19 New string hold design bt Hybrid stringing System enhances power and spin, for Competitive all-around players 3D vector shaft: the throat grooves of the 3D vector shaft improve Racquet stiffness, generating supreme Face stability and giving players more efficient power Aero fin technology: the Racquet is equipped with all new fins inside the top of the frame giving players the best swing, Air resistance on the top of the frame is decreased by 14 percent Black micro core: carbon graphite and elastic particles are added to micro core technology for increased Face stability and even better vibration dampening