3M Filtrete 20 In. x 25 In. x 4 In. (Slim Fit) Allergen, Bacteria & Virus 1550 MPR Deep Pleat Furnace Filter Category_Lawn Bare Wood: Sand surface thoroughly

Bare Wood: Sand surface thoroughly with medium grit sandpaper and progress to fine grit sandpaper

3/8" and 7/16"

18 AWG to 10 AWG

Made of chrome nickel alloy steel

Groove size: 1-3/4' x 2-11/16'

3M Filtrete 20 In. x 25 In. x 4 In. (Slim Fit) Allergen, Bacteria & Virus 1550 MPR Deep Pleat Furnace Filter Category_Lawn Bare Wood: Sand surface thoroughlyFiltrete high performance filters are effective at attracting and capturing 97% of large airborne allergens like pollen, mold spores, and dust mite debris. Captures microscopic allergens like dust, smoke and smog particles. Electrostatically charged filters. Includes a filter change reminder sticker. Lasts up to 12 months. Purple label.