900 Global Black Ops Bowling Ball Covertly dominate your competition with the 900 Global Black Ops bowling ball This ball employs the low RG and super high Diff Break asymmetric core with the S70 solid coverstock to authorize an attack on the midlane to backend hot spot that conquers house and sport lane conditions Color: Black Coverstock: S20 Solid Finish: 1500 Grit, Polished Core: Break asymmetric RG: 2