The Mathews Rubber HDS Body 3/8? Blue is a replacement harmonic damper body designed for Mathews bows and accessories that use 3/8" Harmonic Damping System (HDS) dampers. Harmonic damper bodies are part of Mathews’ vibration-dampening setup, helping reduce noise and vibration through the shot cycle and improving overall feel. The 3/8" size fits bows that use the smaller damper style on risers, quivers, or other mounting points, and the blue color lets you customize the look of your damper components. These custom damping accessories are lightweight and easy to install, giving you both vibration control and a bit of personal style on your bow. Mathews Archery Mathews Rubber (HDS) Body 3/8" Blue 80525