KM-34D series 2 (ZSh-5, 7, 90) This is a major upgrade of the KM-34D pressure-demand type mask. Made in 5 sizes (1=small, 5=extra-large) and intended principally for use with the new ZSh-7 helmet, but could be also attached to the earlier series of ZSh-5 helmets. Mask has a built-in microphone. Connector for the occipital bladder is installed, exiting face-piece on the left side, with main oxygen delivery hose exiting on right side of face-piece. The bayonet attached facepiece features a main delivery hose and exhalation valve hose arrangement similar to the KM-32 and KM-34D masks but is often mistaken for a KM-35, due to similarities between the two masks. Corrugated, fabric-clad OD and black hoses may be found on KM-34d2 polymeric face-pieces molded in several hues of gray (from light to dark).
