The Aerogel 4D 500 is a comfortable frame that offers excellent control and stability. It features Dunlop's 4D Braided technology that consists of four directional braided material that is used at key points on the racquet to significantly increase racquet stability. The 4D technology is located at the 5 and 7 o'clock positions to minimize frame torsion and increase control. The 4D 500 is lighter than the tour model for a more manageable weight and more power. The open string pattern offers easy access to spin for those baseliners who can hit hard. This frame is recommended for players with medium to long strokes and for levels 3.0 4.5.Headsize100 Length27 Beam Width232523.5mm Weight Strung290g10.2 in ColorsYellowBlackWhiteSilver CompositionConstructionAerogel, 4D Braided Graphite String PatternMains X Crosses16x18 Recommended String Tension55 65 lbs.