NXT Duo II combines Wilson's NXT (16/1.30) and Luxilon's Adrenaline (17/1.25) for a blend of crisp responsiveness and arm-friendly comfort. This string delivers excellent ball pocketing and feedback, which allows your shots to feel more stable and controlled. An update to the NXT Duo, this string upgrades from Enduro Pro to Luxilon Adrenaline. For those looking for a more durable option, install the Adrenaline in the mains and the NXT in the crosses. For more playability and feel, place the NXT in the mains and the Adrenaline in the crosses.