It's back...The Pulse, from Columbia 300. How have you survived so long without one? Well, its time to take your game off life support and bring it to a higher level. This Crimson Red classic incorporates the hottest coverstock of the decade, SUPER-FLEX Resin, with the original pressurized polymer core, including the Ceramicore satellite center. The core creates 2-3 inches of track flare, due to its .026 differential Rg. As you remember, the Pulse delivers a smooth, controllable ball reaction. The result is a consistent, predictable ball motion on most common lane conditions. So get a Pulse! You can't live without one!