Product Description Its more than an explosion or an eruption; its the new Columbia 300 Kaboom! Columbia 300 is looking to make Kaboom a household name for bowlers who need excellent length and strong backend without breaking the bank. The engine behind the Columbia 300 Kaboom bowling ball is the new Detonate core. Its symmetric shape is extremely unique, and there isnt anything like it! The Kaboom also gets its easy length and backend from HK22 with Reflex Pearl, the most booming cover base in bowling, and this version produces devastating results. Medium oil and lanes that are breaking down are no match for this explosive release.Color: Blue/Sapphire *Please note that colors may slightly vary from image shownCoverstock: HK22 – Reflex PearlWeight Block: Detonate Symmetric Core with DynamiCoreFactory Finish: 500, 1000, 1500 Siaair Micro Pad / Crown Factory CompoundFlare Potential: 3-4″ (Medium)Radius of Gyration (RG): 2.529Differential (Diff): 0.046Intermediate Differential (Mass Bias): 0.000WeightRGDiff.Interm. Diff.162.5350.0410.000152.5290.0460.000142.5470.0450.000132.5820.0420.000122.6050.0420.000