Jrifedptry 6cm Earphone Sponge Cover, Thickened Ear Cotton Ear Cotton Sponge Cover, Replacement Foam Microphone Cover

2. The sponge cover has three functions: one is to prevent slippage, the other is to prevent sound leakage, and the third is to prevent resonance between the earplug shell and the ear bone. 3. There are small pronunciation holes on the earplugs. When you put the earplugs in your ears or put them outside, it is very likely that dust enter the earplugs through these small holes. The earplugs have a very thin diaphragm, only a few Micrometre, a little dust change the vibration of the diaphragm, which affect the sound quality and even cause the damage of the earplugs.The earplug cotton can block these external debris from entering the earplugs and protect the earplugs. 1. About 6CM (as long as the diameter of the ear cotton originally equipped with your earphone is around 6CM, it can basically be used, the error of 5mm is okay, larger earphones are fine, the ear cotton itself has a certain flexibility) In summary, the sponge cover of earplugs is very useful, please stick to it