Morepwr New Upgrade Replacement Ear Pads for Plantronics Blackwire C320 USB Headset Parts Leather Cushion Earmuff Sleeve|Earphone Accessories| - AliExpress
Foam Donut Ear Cushion for Plantronics Blackwire C310, C320, C3210, C3220 (set of 2)
Plantronics Blackwire C325 Corded USB Headset - VoIP Supply