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The Rebel ECX Proactive Black combines the elliptical asymmetric weight block used in the original Rebel ECX with a new C80P Proactive cover stock. This combination provides an aggressive alternative that features an increased hook potential with a more even reaction compared to the reactive ECX. The Rebel ECX Proactive Black is best suited for oilier lanes or when stronger reactions are desired. The specifications are: Part Number: 60-103366; Cover Stock: C80P Proactive; Hook Potential: 115; Length: 85; Typical Breakpoint Shape: 70; RG Max: 2.585; RG Intermediate: 2.569; RG Min: 2.541; Asymmetric Diff: 0.016; RG Diff: 0.044; RG Avg: 4.8; Hardness: 77-79; Color: Black; Surface Finish: Factory Double Buffed; Weights: 12-16 lbs