Sierra 18-7775-1 Sierra Fuel Water Separator Kit - 3/8" Sierra brackets are precision-machined and powder coated aluminum. Separators remove over 99.8%of emulsified water from your gasoline. All filters flow at 90 GPH to feed even the hungriest motor. Material: Aluminum, Rating: 21 Micron, Size: 3/8". Sierra Fuel Water Separator Kit Meets or exceeds the original equipment quality Sierra part number: 18-7775-1 Interchangeable with the following: Mallory 9-37852, Moeller 33320-10 Material: Aluminum, Rating: 21 Micron, Size: 3/8"