High temperature bunsen burner with adjustable control. Has fine-pitch threaded valve, 1-1/4 in. diameter and perforated monel and wire mesh heat intensifier. Die cast, zinc alloy, nickel plated octagonal base.*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" Serrated