Flight Helmet Straight Drop Communications Cord for Boom Microphone and Helmet Earphones with G/A Plugs, this cord is used when using a CX-4708 Helmet cord and switching configurations between a boom microphone and an oxygen mask fitted with CX-4707 cord. This cord connects directly to the boom microphone (no separate boom microphone wire needed) and helmet CX-4708 helmet cord. It has G/A plugs to plug into civilian aircraft. This cord still allows the use of CX-4708 Helmet cord which is used with CX-4707 oxygen mask cord, new condition. Made in the USA.