The Gamma TNT2 15L Gauge Tennis String Reel is designed for durability, playability and control to help keep your game going strong. Engineered with an Elastalon⢠core and pearl-coated outer wraps, this tennis string is crafted using TNT2® (Thermal Processing Technology) to provide the dynamic elasticity and resiliency needed to ensure ample racquet-ball contact time and smooth, powerful hits. Gamma TNT2 15L Gauge Tennis String Reel Clear - Tennis at Academy Sports