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 Silencers Material: Rubber Application: For Composite Pulley Bow And Arrow, Archery Training Weight: Approx.14g/0.5oz. Package List: 4 x Bow String Silencers Note: 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.