The Wilson Burn Tennis Racket continues to generate power to blast shots from the baseline, but now with a new design that amps up performance and looks. Added Countervail technology maximizes a players energy on every swing while a fresh aesthetic, features a pure and simple design with engineered paint finishes, textures and an improved feel and design. Specification: Grip Sizes: 1 ? 4, Cross Section: 22 mm Flat Beam , String Pattern: 16 x 20 , Unstrung Balance: 32.5 cm / 7 pts HL ,Length: 27.25″ / 69.2 cm , Unstrung Weight: 10.9 oz / 309 g , Head Size: 95″ / 613cm . Recommended for Adults.