Cim-Tek Filtration Hydrosorb Filter Kit detects excess water and removes particulate, such as dirt, dust and rust. This fuel filter is used with gasoline, diesel, biodiesel blends up to B20, and ultra-low sulfur diesel. The filter features 10 micron hydrosorb media. Filters are necessary for keeping dirt, dust and rust out of your engine, protecting your engine for years to come. The kit contains a 72059 fuel filter and 52002 adaptor.