Sierra 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. Type 1/4" Aluminum Filter Short Contains (1) 7944 & (1) 7853-1 Replaces Mercury - 35-802893A4, Q4, 35-60494A4