Quicksilver 802893Q4 Water Separating Fuel Filter - Mercury and Mariner Outboards and MerCruiser Stern Drive and Inboard Engines 25 micron filtering elements Remove damaging or performance robbing fuel Born contaminants Produced to Meet Mercury marine original equipment Manufacturer specifications to best protect your engine Polyester/cellulose/glass fiber with phenolic binder coated with silicon For Mercury, Mariner and force outboards plus mercuries stern drive and inboard engines