Thunderstorm 17G/1.24 String Purple

Featured as X-treme Power, Made with a new material, with 10 sides, which were axially twisted for having like this a better capacity of producing Effects on the ball. This is the string that is favorite amongst many Players using Signum Pro, it has an amazing Spin Potential, great durability, great tension maintinence and a feeling that is worth trying. We've had amazing feedback from this string, so we think this is a must for any Tennis Enthusiast.