Aerodynamic for a faster stroke. FAST STROKES, POWER AND SPIN. Used by Rafael Nadal, the world's top player, four time winner of the French Open title (2005 to 2008) and Winbledon (2008). TECHNOLOGY: CORTEX SYSTEM | AERO MODULAR | GT Headsize: 645 cm2 / 100 sq.in. Weight: 300 g / 10.6 oz. Lenght: 685 mm/27 in. Composition: 100% High Modulus Graphite. Balance point: 320 mm/HL. String pattern: 16 x 19. Grip: Syntec Grip.