Roto Grip’s new UFO Alert exchanges the dull MicroTrax-S20 coverstock found on the original UFO for eTrax Hybrid, prepped from the factory with a 1500 grit polished finish. Both balls share the asymmetrical E.T. weight block, leaving the coverstock and box finish as the distinguishing features that create the reaction differences between the two UFOs. […] Roto Grip UFO Alert appeared first in Bowling This Month.
Source: https://www.bowlingthismonth.com/bowlin ... ufo-alert/