Atec Hi.Per X-Act Dimpled Mach-Softball The Hi.Per X-ACT dimple ball is designed and built to maximize your training machines accuracy. The patented X-ACT (Xtream AerodynamiC Technology) surface pattern maximizes the aerodynamic efficiency of the ball to create the most consistent ball flight every pitch. Made from our proprietary Sting-Blocking material, the Hi.Per X-ACT is safe for use with all performance bats and are the regulation weight and size of a (12) softball.