Ashcroft 451279AS04L30# Pressure Gauge, 0 to 30 psi, 1 2 in MNPT, Plastic, Black AG12SDE58 Big Blue 600 Air Pak Big Blue 600 Air Pak Volume Absorbed Per Pad 28 oz UL 94 V 0 Removable Bezel Yes Scale Type Single Case Construction Solid Front with Pressure Relief Back Includes Mounting Hardware No Freeze Resistant Movement No Primary Pressure Range 0 to 30 Sensor Type Bourdon Tube Vibration Resistance None Burst Pressure 1 400 psi Hazardous Location Rating Not Rated Ambient Operating Temperature Range 20 Degrees to 200 Degrees F ( 29 Degrees to 93 Degrees C) Dry Dampening Feature None Dial Color White Pointer Material Aluminum IP NEMA Rating Not Rated Gauge Wetted Parts Brass Bronze Blowout Safety Back Yes Compatible Process Media Chemical and Petrochemical