Yonex string EXBOLT 65Description: Drill through the opponent defense with agile shots. This model is constructed from a proprietary new material called FORGED FIBER which combines durability, thin gauge, and quick repulsion all into one. With the EXBOLT 65 a new layer is added over top the FORGED FIBER called the Elasticity Outer which increases the hold and improves overall control. Highlights: Gauge 0. 65 mm Length 10 m (33 ft) 200 m (656 ft) Material: Core High