Replacement 4" Filter O-Rings
Suit All 4" Clear View Filters

The o-ring used to seal the window into the filter assemblies are made of viton, which is heat, fuel, solvent and chemical resistant. Its recommended to have a replacement o-ring kit when running a see through filter assembly

4" Filter assemblies use three common o-rings. They are sight window, window retainer & filter housing bore o-ring