Honeywell 12x12x5 (11.75×11.75×4.38) MERV 11 Grille Filter

Nominal size 24″ x 30″ x 5″ (Actual size 23 3/4″ x 29 3/4″ x 4 3/8″) Accumulair Filter for Honeywell model FC40R air filter #FC40R1177 What is MERV? Great for reducing airborne particles such as dust, pollen, mold spores, tobacco smoke, pet dander, and particles that carry viruses. Superior frame strength utilizing double-wall construction and die-cut fingers. High-efficiency filter media collects small dust particles before they can collect on your coils. No assembly required. Easily inserts into and out of existing return grille. Allow a 7″ depth behind grille to provide space for the deeper filter and air flow through filter. Made in the USA. Lasts up to 6 Months!