The Slim 3.0 is used by PGA Tour Pro Jason Dufner, the Slim 3.0 is the most popular SuperStroke model on the PGA Tour, used in 5 worldwide victories last year. The Slim 3.0 offers all players the benefits of our parallel technology in a 1.30" offering. Our parallel technology allows for even pressure in both hands, eliminating added tensions in the wrist and forearms. This helps the arms to swing free, further enhancing a pendulum putting stroke. Starting with a light-weight foam under listing, we have added a new high-tech PU material, featuring Cross Traction technology, for improved fee and tackiness. USGA approved, 1.30" diameter, 10.50" length, 60grams+/-5 and a.580 round core.