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Your competition wont be able to identify this object as it flies down the lane. The Roto Grip UFO high performance bowling ball introduces the E.T. Core - Equalizer Technology which has built in "Equalizer Cavities" that take the place of past weight holes to create more midlane movement as well as continuation down the lane. The MicroTrax-S20 Solid Reactive coverstock provides great traction on heavily oiled lanes.