Yonex Astrox 88 S Tour Badminton Racquet is designed with Namd, which greatly improves the adhesion of the graphite fibres and resin by attaching nanomaterial directly to the graphite fibre. Aero+Box frame combines a solid hitting feel and quick swing. The Isometric equalizes the length of the main and crosses strings in the string-bed, enlarging the sweet spot for more consistent accuracy even on off-centre hits. By applying the counterbalance theory, weight is distributed throughout the grip end, frame top and the joint for maximum control. The transition to the next shot can be performed smoothly with rapid succession. Cutting edge Nanometric carbon technology is used to produce an ultra-thin, ultra-tough, aerodynamic shaft, created for a stronger and more intense shot. The uniquely shaped cap maximizes shaft performance. The front allows the shaft to flex, while the sides arch-shaped curve stabilizes the Racquet face by preventing the shaft from twisting. Rexis is a high-performance shaft precisely designed through an advanced moulding technique with High Quality, ingenuitive, Performance Graphite material. Specification: Flex - Stiff. Frame - HM Graphite, Volume Cut Resin, Tungsten. Shaft - HM Graphite, Namd. Joint - Built-in T-Joint. Length - 5mm longer. Weight/Grip 4U (Avg. 83g). String Advice - 4U: 20-28lbs. Color - Emerald Blue.