The Luxilon Alu Power Vibe tennis string set is designed for high tier performance & it grants all the benefits of the classic Alu Power range including exceptional power & immaculate longevity. This incarnation of the string features a special silicone LXN legacy Dampener material which guarantees more comfort, less arm stress due to superior vibration attenuating properties. This 17 (1.25mm) gauge string ensures a much softer touch & cleaner responsiveness, & it arrives in a standard 12.2m (40ft.) set.