Rotational Generator System - By applying the counterbalance theory, weight is distributed throughout for maximum control. The transition to the next shot can be performed smoothly, with rapid succession | Super Slim Shaft - Designed to slice through the air, generating speedy power. Flex Point - Yonex Astrox 88D has more flex in the upper part of the frame and the overall racquet is 10 mm longer than conventional racquets, which makes it more powerful than ever, giving you maximum power to hit shots | Energy Boost Cap - Uniquely shaped cap which maximizes shaft performance of Namd. The front allows the shaft to flex, while the sides arch-shaped curve stabilizes the racquet face by preventing the shaft from twisting. Aero+Box Frame - A combination of faster swing speeds and a solid feel Specifications : Frame Material - H.M. GRAPHITE + NANOMETRIC + Tungsten | Shaft Material - H.M. GRAPHITE + NamdString Tension - 29 lbs | Weight - 4U (80-84.9 grams) | Grip Size - G4 (3.25 inches) | Balance Type - Head Heavy | Head Shape - Isometric Head Shape | Pre-Strung - Strung | Age - Adult. In-Box Content : 1 Badminton Racquet.