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Civilian SPH-4 Aviation Helmet Upgrades


Ear Cup Components


Additional Components


Note: Choose the appropriate MicMuff® Microphone Cover for your helmet. If you have a dynamic microphone element choose #90010. For an electret element choose #90015. For a military dynamic (M-87) element choose #90020. If you are not sure, give us a call.

ZetaLiner Helmet Liner

ZetaLiner® Helmet Liner. Go to Sizing Page