Static Pressure Fitting, Material Metal, Connection Size 1/8 in, 3/16 in, Compatible Brand and Series Dwyer Megahelic Gauges, Connection Type Hose Barb, Features Plate Rests on Top of Standard 3/4 in Thick Ceiling Tile, Unit Mounts to Junction Box, For Tubing Diameter 1/8 in, 3/16 in, For Use With Controllers, Manometers, Pressure Switches