UNI Filter NU-3252ST Air Filter Fits Yamaha ATV Zodiac R0635400 Top Housing Cover (Blue) for Polaris 360 & 360 Black Max Cleaner Federal Mogul National Oil Seals

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UNI Filter NU-3252ST Air Filter Fits Yamaha ATV Zodiac R0635400 Top Housing Cover (Blue) for Polaris 360 & 360 Black Max Cleaner Federal Mogul National Oil SealsUNI air filters. The principal of how foam air filters work is simple: "Open Cell" polyurethane foam is wetted with specially developed filter oil. The "sticky" filter oil is suspended in the path of the dirty air on the strands of the web like cell structure of the foam. This makes it impossible for the dirt to pass through the strands. As the outer strands become loaded with dirt particles, the wetted strands down stream start trapping dirt,