Uniweld Type28-2 Rosebud Heating Tip Proudly Made in the USA and 100% Flame Tested Use with acetylene and oxygen to achieve temperatures up to 5600 degrees Fahrenheit Rosebud tips are your best choice for brazing, pre-heating, straightening, annealing, bending, forging, etc. Overall length is 12 inches and is ideal for HVAC/R brazing up to 1 5/8 inch copper tubing Type28 Tips fit United's Part No. 71 and Part No. WH550 Welding Handles