Yonex VCORE Tour F Tennis Racquet 310g - Unstrung Color: bright Red; head size: 97Sq.In; weight: 310g/10.9oz length: 27in; material: H.M. Graphite black micro core nanometric stringing pattern: 16/21 Equipped with new string Hole design bt Hybrid stringing System, oversized head provides more Control and spin 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