Float measures 1 x 3 inches. Push-on connector, apparently 12 volts. Very clean and unused. In original boxes and plastic. In original boxes and plastic.
Marsh units are apparently compound gauges, because they show sub atmospheric vacuum as well.
Chrome with plastic face. Like new and unused. Used for filter monitoring, pressure drops, etc. Like new condition, unused. Mirrors have been diamond scraped and are flat to one quarter wave of red light.