By Universal. The microphone comes with a rubber neckpiece and integral wiring loom with PL-291 2-pin jackplug. Also fitted with an elastic neckband (M-199). The throatmicrophone is in reasonably good condition but has some wear at the point where the loom meets the neckpiece and the strap is a little ragged and lacks elasticity. Many AAF oxygen masks were worn without an integral microphone and these throatmicrophones were used instead. They were also used by aircrews wearing headsets, often over 'crusher' caps. Stock code H22244.