Its: Ceramic Face! (and more)
39318-6. So what we have here is your standard ceramic face mounted on Plexiglas with a sticker above the face that says, “Nasal,” because, well we don’t know why.
UPDATE!: So it turns out our mysterious nasal friend is part of a larger deal—the Sci-Con Pressure & Flow Calibration System, which includes a ridiculously nice polished wood box.