TurboTorch A-8 Air Acetylene Tip has a tip size of 5/16" and gas flow of 8.3 at 14 psig. It features removable orifice screw and a color-coded "O" ring to choose the correct tip for preferred gas. It is ideal for high capacity applications like HVAC and is used for soft solder of 1 - 2" or silver braze of 1/2 - 1".