Ultra Allergen Pleated Filter, 3-Month, Purple, 18 x 24 x 1-In. Stops this formula contains DHA for

this formula contains DHA for proper brain and vision development

interior/exterior

Bit is constructed of M-2 high speed steel for the best combination of strength

Jigged Bonestag handle

Crunchy dog kibble combined with tender

Ultra Allergen Pleated Filter, 3-Month, Purple, 18 x 24 x 1-In. Stops this formula contains DHA for18" x 24" x 1", purple, ultra allergen filtrete pleated 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.