Apollo-era red metal oxygen duct connector made by Air Lock, measuring 4″ x 2.75″ x 1″, consisting of three parts: a circular screw-plate, an interior three-section bit, and the main panel with wire filter; the inner bit features part numbers, "PN-2389R, SN-419," and the plate and main panel both engraved, "Class III." In fine condition. This hardware was designed to connect to the flexible oxygen ducts within the Apollo pressure suit.
