Describe1. Foam has the characteristics of high elasticity, durability, and softness.2. It is very suitable for replacement of wear or loss headset microphone pads.3. Compatible for most headset microphones, filtering the burrs of noise and sound.4. Frequent replacement of bacterial breedingSpecificationMaterial: High -density spongeColour: BlackSize: about 30mm in length*width of about 22mm*hole diameter is about 8mmNumber: 10/20/30/40/50Features: Waterproof, windproof sound, prevent mixed color, anti -spray wheatProducts include:10/20/30/40/50*a microphone microphone set