The product being referred to is a metal flange, which serves as a connector between a filter and a duct or fan.
The metal flange is an important component of the ventilation system because it allows for the airflow to move out of the ventilated area. Without the metal flange, the filter would not be able to properly connect to the ducting or fan, which would result in poor airflow and potentially compromise the air quality in the ventilated area.
The metal flange is made of a durable metal, to ensure that it can withstand the pressures and temperatures associated with a ventilation system. It is also designed to be easy to install and remove, so that maintenance or replacement can be done quickly and efficiently. Overall, the metal flange is a crucial component of a ventilation system, as it enables proper airflow and helps to maintain good air quality in the ventilated area.