The Pure Drive Standard Cortex is a very stiff, light and powerful racquet, that’s recommended for tweeners (between intermediate and advanced). Babolat’s Cortex technology is a vibration-buffer down the handle that is extremely useful in preventing tennis-related arm injuries upon impact. Headsize: 100 sq. in. Length: 27.00 in. Weight (strung): 11.3 oz. Stiffness (Babolat RDC): 71 Balance: 12.99 in. Head Light Cross Section: 25mm Head/22mm Throat Swingweight: 313 kg*sq. cm String Pattern: 16x19 Grip: Syntec Product Review: “This is a great racquet. My serve got so much better upon buying this racquet. Compared to before, it's actually kind of ridiculous how hard I can hit it now. It's a very solid racquet. My only problem is that it's too light, but lead tape solves that problem. Awesome racquet.” Jon, Long Beach, CA