Gauge: 15L (1.35mm) Length: 40 feet (12.2m) Construction: Co-polyester Color: Silver This is the thickest, most durable version of Solinco Tour Bite. This co-poly is not only a perfect string for topspin players, but it's ideal for those who require maximum control and durability. Feels firm and can be tensioned quite low without sacrificing control. Also plays great in a hybrid with a soft and powerful multifilament.