Spiral Vibration Damper Spiral vibration dampers are motion-control products designed to eliminate wind vibration that can occur across a cable span. Made of weather and corrosion resistant plastic, these dampers have large spiral shaped vibration dampening sections that fit the size of the cable. A smaller clamping section gently grips the conductor. Using the recommended number of spiral dampers minimizes bending strain and protects the cable from long-term fatigue caused by breeze vibration. Features Eliminates damage caused by wind vibration Reduces overall vibration on bare conductors Made of weather-resistant, non-corrosive plastic Large spiral damping section sized to fit the cable and smaller gripping section gently grips the conductor Conductor ranges are marked and color coded to indicate cable diameter size ranges Suitable for standard and high quality span lengths Applications. Distribution Range Conductors between 0.250 in. and 0.500 in. outside diameter Spans over 800 feet Parts List Standards - Applies to. Bare conductors, shielded wires and OPGW Explanatory notes. (1) When the cable diameter is 0.461" and below, a maximum of three SVDs can be installed in one position.(2) On cables larger than 0.461" diameter, only two SVDs need to be combined in order to obtain the best damping performance.