Pleated Furnace Filter, Ultra Allergen Reduction, 3-Month, Purple, 18x25x1-In. Ratchets Cold rolled steel with a

Cold rolled steel with a plain finish

performance and fuel economy

Universal pin can be switched to auxiliary/electric brake

rough and uneven surfaces including wood

Two week usage period

Pleated Furnace Filter, Ultra Allergen Reduction, 3-Month, Purple, 18x25x1-In. Ratchets Cold rolled steel with a18" x 25" x 1", purple, ultra allergen filtrete filter, 3 month filter is 90% effective at capturing large allergens like mold spores & pet dander, electrostatically charged, captures microscopic allergens like dust, smoke & smog, captures bacteria & particles that can carry viruses, meets the guidelines of the American lung association health house program, mpr rating 1500, lasts up to 3 months.