The Quicksilver® Water Separating Fuel Filter serves up a 25-micron filter that separates water from fuel as it removes other impurities. The filter features a metal shell that's more than 50% thicker than conventional filters. Approximately 4" x 4.25". 25-micron filter. Separates water from fuel. Removes other impurities. Metal shell is more than 50% thicker than conventional filters.