Thunderstorm is a monofilament with twisted, decagonal shape and composition based on copolyester. The average static stiffness is 1.07 kg/mm.
Control Spin
Control-oriented strings favor precision over raw power: they're generally stiffer, holding the ball on the strings for less time and keeping the trajectory more predictable. They suit players with fast, long swings who already generate plenty of pace on their own.
