Replacement mic muff fits all Telex PNR and ANR headsets with flat electret mic.
Compatible with:
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Stratus 50 Digital
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Stratus 30XT
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Stratus 30
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Echelon 20
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Echelon 25XT
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Echelon 150
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Airman ANR 500
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Air 3100, 3500, 4100, & 4105
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Stratus Heli-XT ANR
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Most other standard pilot headsets
