Pleated Furnace Filter, Ultra Allergen Reduction, 3-Month, Purple, 20x25x4-In. Valves & Parts Use them inside

Use them inside

Mount To Wood

use our KT™ series ball stops

Built-in thermostat turns on at +38 °F (+3 °C) or below and turns off at +45 °F (+7 °C) and above

or stand it up with built-in easel stand

Pleated Furnace Filter, Ultra Allergen Reduction, 3-Month, Purple, 20x25x4-In. Valves & Parts Use them insideThe Filtrete, 20" x 25" x 4", Allergen Reduction Filter, 3 Month Filter, For Housing Units Accommodating 4 " Nominal Size Filters & Is For Residential Use, Electrostatically Charged, Attracts & Captures Particles Like Pollen, Mold Spores, & Dust Mite Debris, MPR Rating 1550, Last Up To 12 Months. Actual size: 19 3 4" x 24 7 16" x 4 3 16".