Power your opponents into submission with the YONEX PolyTour Strike 1.25mm12m Cool Black tennis racket string, as used by Denis Shapovalov on tour. Built for longlasting power, the YONEX PolyTour Strike 1.25mm12m maintains tension even after repeated bigimpact shots. Its polyester construction ensures durability, while at 1.25mm, it offers a fair amount of control too and is relatively easy on the arm. Gauge 16L 1.25mm Length 39ft 12m Composition Polyester monofilament Endorsed by Denis Shapovalov and Caroline Garcia Colour Cool Black. For competitive players who rapidly fire attacking shots at fast swing speeds; minimal performance decline even after competitive play.