PetroClear 40530P cellulose filters are particulate removing spin-on filters designed to remove particulate from neat gasoline, Ethanol blended gasolines, diesels, Biodiesel, ULSD (Ultra Low Sulfur Diesel), kerosene and fuel oils. These filters are designed for particulate removal only and WILL NOT REACT TO WATER IN FUELS OR PHASE SEPARATION IN ETHANOL BLENDED GASOLINES TO SLOW FLOW. Available as a single filter or as a pack of 12 filters.