This product is either discontinued or we cannot get that from suppliers.
Poly Plantronics Spare Ear Cushion 213364-01, Mono Voyager, Earshells, Black, Plantronics.
The Poly/Plantronics Spare Ear Cushion 213364-01 for Voyager 4210 Mono is a replacement ear cushion which is specifically designed for Plantronics Voyager 4210 Mono.