BASIC INFORMATION: It is not only a perfect size for audio-technical ath-m50X earpads, and is compatible with MSR7,MSR7BK,M30,M40X,M50,M50S, with the dimensions of length: 3.93inch/100mm, width: 3.15inch/80mm, height: 0.79inch/20mm PROFESSIONAL MATERIAL: Memory cotton has good slow rebound characteristics, strong impact absorption ability, strong external stability of ear jacket, and is not easy to deform. USE ENVIRONMENT: In normal temperature, dry environment, earmuffs have longer life, try not to use in high temperature, humid environment, it will be oxidized, cortex off. And often wipe it with a wet paper towel!