Storm has brought back the Catalyst Core in the Storm Crux Prime high performance bowling ball. This popular core has been known for its unmatched power, increased entry angle, as well as allowing more room for error due to dynamic asymmetrical design and vertical cavity technology. The SPEC coverstock used in this ball stands for Storm Performance Enhanced Coverstock. This special coverstock was specifically designed to endure the friction and oil a bowling ball goes through each time it is thrown down the lane. The SPEC Solid Reactive coverstock used on the Crux Prime is best used on heavier oil conditions and really shines when the lanes start to transition. No matter what lane condition this ball faces it will consistantly read the midlane and store energy for the backend.