Wilson VERTEX 8000 A bargain at 27,500 yen, pre-strung! ★ Wilson's highest-end speed model, the VERTEX series, embodies new technology and specializes in speed, delivering high-level performance. In addition to the Aero Speed Frame structure, high-elasticity carbon fiber is used in key areas to achieve the easy swing and high responsiveness demanded by players who utilize technique. This is a lightweight 6U specification model that enables high-level speed play. Specifications Shaft: Normal Approved/Specifications: Approved by the Japan Badminton Association Material: Ultra High Modulus Carbon Fiber Remarks: Comes with a soft case Recommended Tension: 22-26 lbs Maximum Tension: 28 lbs Weight: 73.0±2g/6U Balance: Head Heavy