Quantity: You will get 30 pieces of 30*22*8 mm foam microphone protection cover, enough for your replacement, you can also share with your friendsSuitable for small lapel and headset microphones, such as office phone headsets, class headsets, gaming headsets and many others. Suitable for both indoor and outdoor venues usePerfectly protect your microphone from dust, reduce wind interference noise and other unwanted background noises, and effectively improve qualityMaterial: Made of foam, soft and comfortable to touch, with nice elasticity, not easy to deform, and fit the microphones well. (Note: Foam microphone covers may be pressed dueing to transport, they have excellent elasticity, just take them out for a while, and then it will return to its original shape)Size: 30*22mm/1.18*0.87 inch, hole inner diameter 9mm/0.35 inch. Please check your microphone size before purchase to save your precious time