Showcase controlled power on court when you play with the Wilson Duo Power Alu P 125 x NXT P 16, a combination of Luxilon Alu Power and Wilson NXT Power that is gentle on your arm and provides a great feel when you strike. The Wilson Duo Power hybrid is designed for players looking for outstanding playability. It combines the control, spin and durability of a copolyester with the soft responsiveness of a multifilament for unparalleled comfort and performance. Gauge Alu Power 1.25mmNXT Power 1.30mm Length 12m Composition Hybrid Wilson's Duo Power pairs NXT Power (16/1.32) with the ALU Power (16L/1.25) for ultimate power. The soft, explosive nature of the NXT complements the top-notch blend of power, spin and durability of the ALU Power. The ALU Power strings used in this set contain a slightly thicker diameter, making them a more durable option than the thinner version. For ideal playability, reduce tension on ALU Power at least 10%. Either string can be installed in the mains for superior power and performance.