Mizuno Caliber S-Boost Badminton Racket (Unstrung)The Caliber S Boost racket's feel and control are greatly enhanced by the Strategic placements of the Power Grommet along the 3, 9, and 12 O clock points of the racket. The V Frame design reduces vibration as it disperses the impact more evenly around the frame resulting in an enhanced feel and delivers controlled shots with devastating power. Specifications Length: 675mm Weight Size: 4U5 (81 85g) Flex: Medium Balance: Head Heavy Head Light Max