Description
The HEAD Sprint Pro 4
Style #: 10369989
The Uniform Impact Grommet system increases string movement for a more even
The pleated skirt and airy racerback design allow you to glide easily
Tecnifibre NRG2 - String Reel - Black weight-heavy The HEAD Sprint Pro 4The NRG was designed with one specific goal in mind: to be the engine of your racquet! This is the primary purpose of the NRG, the most powerful string in the range. It features a unique construction of over 1200 microfilaments, made of Elastyl (12% more elastic than standard polyamide). Impregnated throughout with polyurethane 400 to generate power and comfort. And finally, the exclusive surface treatment: SPL, to provide smoothness and an effective