The Broadband truly sets a standard of performance with reducing vibration and noise. The Broadband LimbSaver is a scientific masterpiece, promoting the first ever Multi Durometer Dual Broadband technology. The Broadband LimbSaver is engineered to function within a specific broadband frequency 20 Hz-20,000Hz. The combination of the NAVCOM ring and center dampener, produce the broadest frequency response of any limb dampener ever produced, period. Extremely Efficient and Effective. Dual Broadband Frequency Technology, Superior Noise and Vibration Reduction, Innovative Reaction Mass Technology, Low Profile & Lightweight, Interchangeable Colored Broadband Rings, Simple Installation. Solid Blue. 4003.