The EAR-045-100BK from Williams Sound is a 100 Pack (50 Pair) of Replacement Ear Pad Covers (Black) for use with:
Williams Sound HED-021 : Folding Headphones Williams Sound HED-026 : Rear Wear Headphones Williams Sound HED-027 : Heavy Duty Headphones Williams Sound MIC-044 : Noise Cancelling Mic Williams Sound MIC-044-2P : Noise Cancelling 2-plug Headset Mic