This is a high temperature bunsen burner with adjustable control. It has a fine-pitch threaded valve, 1-1/4 in. diameter and perforated monel and wire mesh heat intensifier. It is has a die cast, zinc alloy, nickel plated octagonal base. This bunsen burner is for use with all gases. *Note: CFHs and BTU Outputs are figured on: 5 inch water column pressures for artificial and natural burners. 11 inch water column pressures for LP burners. Inlet OD for all burners: 5/16" and serrated.