Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierras 10 micron filters are over 90% efficient at removing particles as small as 10 micron. All filters flow @ 90 GPH to feed even the hungriest motor. Recommended to prevent damage to sensitive inboard and outboard fuel injection systems.. Includes: Bracket, Filter and 2 brass pipe plugs (3/8 plug - 18-4264, 1/4 plug - 18-4256)