Improve your welding visibility and productivity with Furick BBW Diffusers. These high-quality diffusers are made of stainless steel and are designed to fit most TIG welding torches. They help to reduce the glare and heat from the welding arc, making it easier to see your work and get a better weld. BBW Diffusers also help to improve productivity by reducing eye fatigue. Features Full ceramic construction for durability and long life Threads on 45V44 gas lens for 9 or 20 torches Recommended for DC only and 3/32 tungsten Best results with 30 CFH of argon flow Instructions Keep tungsten clean at all times Start arc at a low amperage Establish Arc on tip of tungsten then roll into the desired amperage. If arc wanders, clean tungsten or damage to the Screen Diffuser is possible. Keep screen in the shape it comes with and try not to deform the screen. If screen replacement is needed make sure Screen is sealed against the walls of the cup or undesired results may occur.