2580U Vent Sizing Gauge 5 - 10mm
The Monument 2580U Vent Sizing Gauge is used to measure the size of the slots in an air vent to calculate the area of ventilation provided by a vent where this info is not readily available. The gauge is stepped in increments of 1mm and will measure vent slots from 5mm up to 10mm. Made from stainless steel.