The Vulcan Hart 00-418051-00057 Range Open Top Burner Orifice is a gas metering component used within compatible commercial range burner assemblies. Its #57 orifice opening controls the volume of gas entering the burner before combustion. Installed at the burner gas connection, it provides a calibrated passage that directs fuel toward the burner ports for flame production. The orifice... https://partsfe.com/orifice-57-for-vulcan-part-00-418051-00057