GENUINE Honda OEM FUEL FILTER for FL250 Odyssey Dune Buggy. The OEM part number is 16900-611-024 (was 16900-611-014, 16900-611-004 and is substitute 16900-538-024).  Use these numbers to verify fitment to your application. This was the original straight through design. For universal application:

50 mm long, 45 mm high

5.5mm (1/4")ID fuel line (inlet)

5.5mm (1/4")ID fuel line (carb)