Yeah, you read that correctly, prior to this out of this world concoction from their R&D lab, the original Momentous™Core was exclusive to our international market. But after countless seconds, minutes, hours, days and weeks of computer research and testing, Roto Grip figured out that density changes to this particular block and slug when placed in A.I. Core technology provided them with a motion they hadn't seen before. And after multiple on lane tests, it was a quick and easy decision that they just had to wrap this baby with the time tested and proven eTrax PLUS Pearl Reactive coverstock to give you all an overall reaction unlike anything offered on earth today.