Toparchery Otter Hide Bow String Silencer One Pair Made of premium lightweight otter hide,works well to all types of bows Used on the bow string to vibration dampener when you are shooting,holds up well under all kinds of weather Lenght:7.87"(20cm),weight:3g Otter ball's length as around 5.5 to 5.9 when enwind onto the bow string Package include:one pair of otter string silencer