The Cyclone Torque core is surrounded by a GB 11

firmer design of the Robby's Plus

EZ Grip rubber dots

Radical The Closer Pearl Bowling Ball

Columbia 300 Dynamic Swing Bowling Ball Select Weight:16 lbs. The Cyclone Torque core isColumbia 300 Dynamic Swing Columbia 300 is introducing the Dynamic Swing Hybrid by bringing back a modified version of the Full Swing core. They paired this popular core with the ERT Hybrid coverstock with a dull finish to dominate medium to heavy oil conditions and provide a strong midlane and backend reaction. Color: Black Caramel White All colors do vary somewhat from the picture shown Core: Modified Full Swing Coverstock: ERT Hybrid Finish: 500,