900 Global Cove Bowling BallColor:Blue/Sand/TealCoverstock:RB 85 Hybrid ReactiveWeight Block:Magna A.I. CoreFactory Finish:4000-grit AbralonFlare Potential:MediumRadius of Gyration (RG):16lbs – 2.48; 15lbs – 2.49; 14lbs – 2.50Differential (Diff):16lbs – 0.043; 15lbs – 0.044; 14lbs – 0.043Intermediate Differential (Diff):n/aFragrance:N/AAdditional product information:The Cove is the latest offering in the 800 Series. Fitting just above the Zen 25, the Cove features the ALL NEW RB 85 Hybrid Cover and symmetric Magna A.I. Core. The RB 85 Cover is a new dynamic creation by our R&D team that will ensure you a proper read of the lanes. The Magna A.I. Core, with it’s balanced dual-hemisphere design, will give you one of the most continuous and stable shapes available.