Wilson Revolve Spin Tennis String is made for players looking for the maximum spin possible in their game. The UHMW coating gives the stirngs the freedom to move around freely and snap right back into place after hitting the ball. This New string has pentagonal construction for increase spin compared to it's smooth predecessor. This co-poly will deliver More Win by excelling in durability and spin effect, which is specially enhanced by frames with Spin Effect Technology, new from Wilson. Revolve Spin is great for players who hit hard and want great control and spin - especially from the baseline.  Construction: Co-Polymer Monofilament Color: Green | Black Gauge: 1.35mm (15G), 1.30mm (16G), 1.25mm (17G)