The extremely efficient LimbSaver Cable Guard Dampener reduces up to 90 percent of cable guard noise. The lightweight, low-profile cable guard dampener measures 1.8 inches in diameter and 1 inch thick, and it weighs just 0.55 ounces. It's made from LimbSaver's proprietary NAVCOM technology (Noise and Vibration Control Material), which effectively absorbs a wide range of frequencies to dissipate energy and vibration.