Pleated Furnace Filter, Ultra Allergen Reduction, 3-Month, Purple, 20x20x4-In. Category_Conduit & Fittings Do not apply by hand

Do not apply by hand or hand-held rotary devices such as hand-held rotary applicator

includes an integrated drain vent for easy cold weather maintenance & protection against freezing

includes 2 roller end caps

Replacement thermocouple for gas furnaces

Batteries are date-coded and 100 percent mercury-free

Pleated Furnace Filter, Ultra Allergen Reduction, 3-Month, Purple, 20x20x4-In. Category_Conduit & Fittings Do not apply by handThe Filtrete, 20 x 20" 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 19 3 4" x 4 3 16".