Vibration dampening peep sight. This revolutionary take on a traditional product dampens unwanted string vibration, reduces noise and increases arrow speed. The secret is in the elastomeric vibration dampening nodules. These nodules work against string vibration to not only make your bow quieter, but also increase arrow speed. A 1/4" elliptical hole increases light transmission and becomes round at full draw. The Whisper peep has a post extrusion for a rubber tube that aids in peep alignment. 30 grains.