Features: It can keep your microphone from drop, bump and shock. Protects your microphone from slipping from your hand. Made of high-quality silicone material and has a long service life. It is easy to use, washable, non-toxic and tasteless, good toughness, anti-corrosion; Anti-Roll Ring Inner diameter: 35mm, fits for most stage microphones. Specifications: Material:Silicone Color:Blue,Orange,Black,Gray;(Optional) Anti-Roll Ring Thickness: Approx. 0.65cm/0.26in, Anti-Roll Ring Hole Diameter: Approx. 3.5cm/1.38in; Microphone Tail Cover Total Length:Approx. 4.35cm/1.71in Microphone Tail Cover Inner Diameter:Approx. 3.4cm/1.34in Microphone Tail Mouth Inner Diameter:Approx. 2.6cm/1.02in; Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2Set Anti-Roll Rings for Case