Sierra fuel water separators remove over 99.8% of emulsified water from your gasoline. Sierra&';s 10 micron filters are over 90% efficient at removing particles as small as 10 microns. All filters flow @ 90 GPH to feed even the hungriest motor. Sierra 10 micron filters are recommended to prevent damage to sensitive inboard, sterndrive and outboard fuel injection systems.. Specifications Size: 3.88 in.; Dimension: 4 H x 4 W x 4 L; Weight: 1 lbs; .