Averaging Flow Sensor, Insertion Length 12 1/2 in, Maximum Media Temperature 120 Degrees F, Connection Size 1/4 in, 3/8 in, Connection Type Push-On, Series PAFS-1000, Wetted Materials ABS/Polycarbonate, Center to Center Distance 2.75 in, Flange Length 3.5 in, Flange Width 1.25 in, For Media Air, Compatible Gases, Includes Integral Mounting Flange with Gasket, K Factor 1.58, Maximum Operating Temperature 120 Degrees F, Minimum Media Temperature 40 Degrees F