Feature:1. Main Function: Can reduce the vibration of the bowstring to reduce the sound caused by vibration.2. Rubber Material: Made of high quality rubber materials with strong toughness, durable, long service life.3. High Performance: Has good noise reduction and shock absorption effect, which gives you a wonderful archery experience.4. Suitable Range: Suitable for composite pulley bow and arrow to achieve better training rusult and higher level improvement.5. Package Content: The package contains only 4 bow string silencers, other accessories and tools need to be prepared by yourself.Specification:Item Type: Bow String SilencersMaterial: RubberApplication: For Composite Pulley Bow And Arrow, Archery TrainingWeight: Approx.14g or 0.5oz.Package List:4 x Bow String SilencersNote:Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.