Signum Pro Thunderstorm String Tennis which creates a more forgiving

which creates a more forgiving contact zone along with a larger spin window

The new Signum PRO Race Grip never gets tired

At 11 ounces strung and boasting a sub 320 swingweight

it gives improving intermediate players the perfect tool for mastering stroke mechanics and rising to the next level

Signum Pro Thunderstorm String Tennis which creates a more forgivingThunderstorm is one of our best selling strings branded by Signum Pro and featured as X treme Power. It was made with a new material, with ten sides axially twisted to produce Effects on the ball. This string is a favorite amongst many Players using Signum Pro; it has incredible Spin Potential, excellent durability, significant tension maintenance, and a feeling worth trying. Weve had fantastic feedback from this string, so we think this is necessary