The Racor Fuel Filter Funnel features rugged construction, Teflon-coated stainless steel filter, electro-conductive plastic material, corrosion resistant and self cleaning function, for filtering fuels such as gasoline or diesel. Racor Fuel Filter Funnels separate damaging water and contaminates from gasoline, diesel, heating oil, and kerosene. Racor Filters remove free water and solids down to .005 or .003 inch and allow visual inspection of the integrity of your fuel supply as you refuel.