Owners of David Clark's H10-40 and H10-46 models can restore their trusty headsets to good-as-new quality with this low-cost replacement microphone windscreen. Designed to fit David Clark's M-4 amplified electret mics, this mic muff serves to curtail wind noise and unwanted cockpit sounds so your transmissions include nothing but crystal clear audio. Slips on easily to replace worn out mic covers. An extremely affordable, must-have item for anyone whose M-4 mic windscreen has seen better days.