Alnor AXD610 Micromanometer HVAC Duct Balancing Differential Pressure Device electric Outer edge to edge (frame):

Outer edge to edge (frame): 45-1/2 x 16-1/4

This is a roll up cabinet door for a mid 70s to 80s trailers

MOVING LIGHT SECTION:

Wind Reduction reduces noise and interference that is produced when wind passes over the microphone

Alnor AXD610 Micromanometer HVAC Duct Balancing Differential Pressure Device electric Outer edge to edge (frame):Micromanometer, Pressure, Velocity Measure differential and static pressure from 15 to +15 in. H2O ( 3735 to +3735 Pa) Calculate and display velocity when using a Pitot tube The AXD610 is an easy to use, handheld digital Micromanometer for fast, accurate and reliable pressure measurement. It can also calculate velocity. The AXD620 is a rugged, compact, comprehensive Micromanometer that measures pressure, and calculates velocity and volumetric flow