Solid Brass Forged Head with Heavy Duty Stainless Steel Tubes. Long lifewith maximum service and minimum maintenance. Optimal performance with any fuel gas. Cutting thickness : 3/4 Inch (19mm). Heavy duty cutting torch is constructed of premium brass, heavy duty stainless steel and high strength alloy which is resistant to high temperatures. OXYGEN ACETYLENE CUTTING TORCH SET? It includes 1-1-101 Cutting Tip/Nozzle(You can also use other models of cutting tips/ nozzle according your needs), Check Valves, Cutting Handle 315FC with outlet nipple and nut (9/16 - 18) Cutting Attachment CA2460. This split design makes the Oxygen Acetylene Torch Kit very convenient to store and install. Just attach the 1-1-101 cutting tip with our straight 90-degree solid forged head, then connect the oxygen and gas tank to the torch handle, you can easily install this oxygen acetylene cutting torch on your gas tank. Includes Check valves for additional safety - Use of flashback arrestors is always recommended? The check valves to prevent flashbacks of the flame beyond the location of the arrestor and stop the reverse flow of gas, which is known as backflow. Oxygen(9/16" - 18), Acetylene/Propane Interface(9/16" - 18) Rear-mounted pressure handle switch is easy to operate.