The Vulcan Hart 00-719951-00037 Range Hood Orifice #37 is to support precise combustion and dependable performance in compatible commercial range hood applications. This precision orifice regulates the volume of gas entering the burner assembly by restricting flow through a calibrated opening, establishing the appropriate fuel-to-air balance for efficient combustion. https://partsfe.com/orifice-37-for-vulcan-part-00-719951-00037