The Outer Limits Pearl is a pearl version of the original released last season. The Outer Limits provided a controlled yet very continuous motion at the backend of the lane and matches up best on medium to oily lane conditions. By adding pearl to our already great HK22 resin, bowlers will see more skid through the front part of the lane and a much stronger and quicker change of direction at the breakpoint. The RG of 2.499, differential of 0.051, and a lower intermediate differential of 0.014 make the Outer Limits Pearl a versatile asymmetrical ball usable on a wide range of patterns. LEVEL: Reliable Color: Indigo/Purple/Silver Core: Outer Limits Asymmetric Coverstock: HK-22 Pearl& Cover type: Pearl Reactive Finish: 500, 1000, 1500 Siaair/ Factory Compound Weights: 12-16lbs Warranty: 2 Years from purchase date RG: 16lbs (2.509) 15lbs(2.499) 14lbs(2.515) 13lbs(2.589) 12lbs(2.612) Diff: 16lbs(0.045) 15lbs(0.051) 14lbs(0.051) 13lbs(0.043) 12lbs(0.043) ASY: 16lbs(.013) 15lbs(.014) 14lbs(.014) 13lbs(.011) 12lbs(.011)