This is the replacement front surface burner tube and orifice for your gas range. You will find the orifice under the cooktop, beneath the burner. This part supplies fuel from the gas line to the stove top. Be sure to disconnect your range from its power source and turn off the gas line before you begin this repair. The orifices should simply screw out, and the new one will screw in. It is sold individually and is a genuine OEM part sourced directly from the manufacturer.