The Southbend 1008757 Range Hood Orifice helps regulate gas flow for consistent burner operation in compatible commercial cooking equipment. Made from brass, this high orifice features a 3/8"-27 connection and a 1/2" size, with a No. 57 orifice specification. It works by controlling the amount of gas delivered to the burner, helping maintain the proper fuel-to-air balance for reliable... https://partsfe.ca/orifice-57-for-southbend-part-1008757