Static Pressure Probe Aspiration Insertion Length (In.) 3 1/2 in Exterior Length (In.) 1 3/4 in Overall Length (In.) 5 1/4 in Mounting Flange 4 Hole Flange Dia (In.) 1 1/2 in Mounting Hole Dia (In.) 3/16 in Mounting Hole Center to Center (In.) 1 in Fitting Size 1/4 For Use With Air Pressure Sensing Switches Includes -