STORM's pride and joy, "Absolute." The Sentinel™ Core is a simple and unique design, yet incredibly powerful. It is a masterpiece created by the STORM development team. The core technology controls the specific gravity of the material, providing straightness, sustained rolling, and the R2S™ Deep Solid Reactive system, making this a versatile board that provides smooth, controllable performance even in thin lane conditions. It maintains an ideal trajectory even in dry conditions, and at the break point it produces a sharp, strong curve and powerful back-end power, resulting in an attractive pin action that is comparable to the Physics series. Surface: Power EdgeCore: Sentinel CoreCoverstock: R2S Deep Solid ReactiveColor: Emerald/Dark Emerald/BlackRG: 2.48 (15 lbs)Differential: .050 (15 lbs)PSA: .021 (15 lbs)Scent: Green Apple