Direct from manufacturer. Made in the USA.
Filter material: 100% monofilament polyester with water repellent finish standard on all pre-filters. Black, closed top, round tapered pre-filter.
Measurements: 4.375"(top diameter) x 5.375"(base diameter) x 5"(height)
Fits K&N Air Filters: RU-2520, RU-4250
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