Glass-Trac Reflex Gauges use prism glass to provide an excellent indication of the liquid level.
On Glass-Trac Reflex Close Hook-up Gauges with ½” NPT connections, the center-to-center dimensions is the same as the overall length on standard gauges.
On Close Hook-up Gauges with ¾” NPT connections, the center-to-center dimensions is the same as the overall length on standard gauges plus ⅜”.