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