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Direct from manufacturer. Made in the USA.

Filter material: 100% monofilament polyester with water repellent finish standard on all prefilters.
Black open top, round straight prefilter.
Measurements: 7.0"T, 7.0"B, 2.0"H

Compare to K&N E-4521DK
Fits K&N filters: E-4521, E-3360

Applications: KOHLER CH18, CH25, & CV25 MODELS