CARBONEX 21 YONEX Badminton (Racquet Unstrung) SOLID AND EFFORTLESS PLAY The Round -shaped and box-shaped cross section frame gives Carbonex a unique and solid feeling. For players who seek a solid feel from the strings at impact. Elastic Ti provides the high elasticity needed for structural high strength and a powerful rebound effect. At impact, elastic Tu resists deformation, stretching the recovering its shape quickly. The BOX SHAPE FRAME provides solid feeling and high face stability. YONEX ROUND-SHAPE FRAME AND SLIM SHAFT GIVES CONSISTENT AND STRONG REPULSION SOLID FEEL CORE, BOX frame, Built in T-Joint