Improves communications by reducing wind and ambient cockpit noise while transmitting. Check the Model of your microphone for correct size.
Fits M-1/DC and M-87 Microphones. For use on headsets such as the H10-30, H10-36, H10-66, and H10-76. For most other David Clark Headset, you should get part # 11-09201
Does its job, but the first one I bought slipped off and was lost. Suggestion to make 1/4 longer so that drawstring can cinch up tighter.