Upgraded TX-25 Pearl Reactive Coverstock Through extensive testing, it was obvious the pearl cover needed to be upgraded to maximize performance. In order to create a truly worthy counterpart, we decided to keep things as simple as possible. The exact same colors in the Phaze II have been used in the Phaze II Pearl. This ball is finished with Power Edge. Velocity Core The Velocity Core perfectly blends an early revving motion with an assertive, yet controllable backend. You get trusted backend and consistent motion in one refined performance package. The Phaze II Pearl is what bowlers worldwide have been asking for — a versatile, responsive complement to our lineup. For nearly 10 years, the premier choice for symmetric performance on medium to heavy oil has undoubtedly been the Phaze II. The Phaze II Pearl broadens the spectrum of performance within the Master line by bridging the gap between the original Phaze II Solid and IQ Tour series.