Pad and Frame Air Filter (1 Frame and 6 Pads) - 7" x 7" x 3/4" Quantity:Default than standard fiberglass filters purchased

than standard fiberglass filters purchased at retail outlets

these can be purchased in any conceivable size

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And there are no metal parts that could lead to corrosion or oxidation within the filter

Pad and Frame Air Filter (1 Frame and 6 Pads) - 7" x 7" x 3/4" Quantity:Default than standard fiberglass filters purchasedIncludes one Frame and PACK of 6 pads The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts. The permanent frame is constructed of space age plastics that are resistant to corrosion, oxidation and deterioration. Filtering inserts are anti microbial and are more efficient in capturing particles, such as dust, ragweed, pollen, etc., from the air stream, than standard fiberglass filters purchased at retail