Yonex VCORE 26 100 (250) Flame Red Junior Tennis Racquets : Beconing in the "New Shape of Spin" the Yonex VCore 26 100 (250) Flame Red junior tennis racquet features the advanced technologies needed to help young players implement greater power and spin into their game. The ISOMETRIC technology helps to create a 7 percent larger sweet spot to maintain power and improve control. New Aero Fin technology just above the throat helps give players a faster and thinner frame. Features a square-shaped ISOMETRIC frame. Features optimal maneuverability from Aero Trench technology. Ideal for players ages 9 to 11 years old.