Attention topspin players! Yonex Poly Tour Spin G is uniquely qualified to grab and rotate a tennis ball. With its pentagonal shape, it comes with 5 sharp edges for ripping into the felt. To help increase ball rotation, this advanced co-poly comes with a special silicone oil infusion to enable the strings to slide out of position and snap back with vicious force. In addition to its impressive spin potential, Poly Tour Spin G is firm and low-powered, giving advanced players the freedom to take massive cuts at the ball. Ultimately, this is a great option for big hitters who want spin, control and durability. Gauge: 16L/1.25mm Length: 660ft/200m Composition Co-polyester Monofilament Color: Red Yonex Tennis String PTSG125R