The Dunlop Aerogel 4D 300 is designed for the aggressive, hard hitter. Featuring Dunlop's new 4D BRAIDED technology for 33% more stability and control compared to previous Dunlop technologies. 4D is constructed using four braided fibers of super light S glass fiber wrapped in an aluminum alloy sheath and placed at 4 different touchpoints around the frame. Because 4D requires only 1 layer of carbon fiber instead of the conventional 4 layers, the racquet is then softer, enhancing touch and feel at ball contact. The Aerogel 4D 300 offers superior control and maneuverability with a 16 x 19 string pattern for players who like to put spin on the ball. This flexible frame is suited for intermediate to advanced players and recommended for level 4.5 7.0. HEADSIZE98 LENGTH27 BEAM WIDTH21MM WEIGHT STRUNG305G10.7 OZ COLORSREDBLACKSILVERWHITE COMPOSITIONCONSTRUCTIONAEROGEL, 4D BRAIDED GRAPHITE STRING PATTERNMAINS X CROSSES16 X19 RECOMMENDED STRING TENSION55 65 LBS.