Mizuno Prototype X-1.2 Badminton Racket (Unstrung) (Prussian Blue/Canary Yellow)With Engineered Elevated Ridges for strength and smoother aerodynamics, and Aerogrooves for better string hold and stability, Prototype X 1. 2 delivers the perfect blend of power and precision complete with a sleek design. FEATURES Engineered Elevated Ridges The ergonomically contoured shape of the frame strengthens the structural integrity and reduces unwanted drag. This results in an increase of power that does not alter the frames stability