Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A61WS-RD found under Shield Microphone by Shure Bros Inc. The National Stock Number assigned to this part is 5965011308511, and the Federal Supply Class is 5965 Headsets Handsets Microphones And Speakers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A61WS-RD.