National Torch Cutting Acetylene Welding Brazing Torch Tip Welding 7490-a-5 LotNational Torch Cutting Acetylene Welding Brazing Torch Tip Welding 7490 a 5 Lot not certain of all fitments & applications look at pics thats what your buying! have a bunch of torch tips all new in pkgs selling off in small lots check out our other listings! some info below we found from google National 7490A 5 cutting torch tip. It is a heavy duty tip designed for use with oxy fuel cutting torches. The concave shaped tip end helps reduce backfire and