Used Drilled Roto Grip Rubicon Azure/Black/Navy 15lbs Bowling Ball You deserve the very best on the lanes. The Rubicon from Roto Grip will deliver... Roto Grip recently re-formulated the eTrax cover to create the new eTrax-S20 solid reactive coverstock for this ball. Finished at 3000-Grit Pad, the Rubicon can handle medium to heavy lane conditions without losing traction or control. Inside, the Rondure asymmetric core will provide an overall increase in ball motion in all parts of the lane. Be the best with the Rubicon. Coverstock: eTrax-S20 Solid Reactive Weight Block: Rondure Core Ball Finish: 3000-grit Pad Finish: Polished Ball Quality: First Quality Lane Condition: Medium-Heavy Flare Potential: Medium-High Brand: Roto Grip Ball Color: Azure/Black/Navy Breakpoint Shape: Length with Controllable Backend Core Name: Rondure Core Type: Asymmetric Product Line: HP3 Durometer: 73-75 RG: 2.49 Diff: .052 Mass Bias: .011 20RUBG30F035