Track Criterion Inverse Bowling Balls KR Royal Flush It is both flexible and

It is both flexible and never-ending

Coverstock: Toxin-R

Its low differential and asymmetry allow the Blue Coral Venom™ to attack the pins from shallower angles using a more aggressive cover stock

The Rattler NU features the latest advancements in Coverstock known as Not Urethane (NU)

Screen printed and embossed Brunswick crown logos

Track Criterion Inverse Bowling Balls KR Royal Flush It is both flexible andThe Criterion Inverse literally turns convention on its head. By switching the densities of the two density inner core that were already proven in earlier Criterion releases, Track has created new core numbers and a whole new motion on the lanes. The result is a cleaner, more controlled reaction that smoothly blends wet and dry transitions. This is better than traditional asymmetric balls, which tend to read too early or jump too hard off the spot.