Sierra Filter Bracket Alum 3 8 NptSierra fuel water separators remove over 98. 8% of emulsified water from your gasoline. Sierra's 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). Filter : Micron : Type : 3 8"