The new YONEX VCORE Si bites back. With our enhanced grommet technology and string hole design, the VCORE Si allows for more main and cross string movement resulting in longer dwell time and more spin. YONEX`s innovative technology has produced unique new grommet holes that maximize string movement to generate the greatest spin. All YONEX racquets are ISOMETRICTM, it is our signature racquet technology that we developed over 30 years ago and has helped some of the world`s greatest players achieve global success. New carbon graphite and elastic particles are added to MICRO CORE technology for increased face stability and even better vibration dampening. The throat grooves of the next generation 3D VECTOR SHAFT, are extended from the grip through the component, generating supreme face stability. The Super Cushion Grip minimizes vibration. The cushioning performance of the grip helps protect the wrist, forearm and elbow against shock-induced injuries. Features: *Head Size: 100 sq.in. *Weight: G: 300g / 10.6oz, LG: 280g / 9.9oz *Length: 27.0 in. *Material: H.M. Graphite, BLACK MICRO CORE, NANOMETRIC *Stringing Pattern: 16/19