Visu-Filter Universal In-Line Fuel Filter Universal 1/4 Fuel Filter. Visu-Filter In-Line Fuel Filters hold more filtered fuel than any other comparable filters. The clear PET housing is gas, diesel and alcohol resistant. Hose Barb Size: 7.9mm Fuel Line Recommendation: 1/4 inch Flow Rate with 3.5 inch Fluid Head: 7 gallons per hour Average Micron Rating: 40-70 Housing and Cap Material: Clear PET (E-85 compatible) Filter Media: Sintered Porous Bronze Made in U.S.A.