3M Filtrete 20 In. x 25 In. x 1 In. Ultra Allergen Healthy Living 1550 MPR Furnace Filter Magnum Constructed of solid hardwood

Constructed of solid hardwood

it clogs and corrodes pipes

Includes one each: 8 mm

thick material that give the versatility needed to build with boards and plywood

lightweight ballistic poly fabric

3M Filtrete 20 In. x 25 In. x 1 In. Ultra Allergen Healthy Living 1550 MPR Furnace Filter Magnum Constructed of solid hardwoodFiltrete ultra allergen reduction filter. Captures large allergens like mold spores and pet dander, microscopic allergens like dust, smoke, smog particles, bacteria, and particles that can carry viruses. Up to 3 months of filtering performance. Meets the American Lung Association's Health House indoor air quality guidelines. Purple label.