Flanders PrecisionAire 20 in. x 21 in. x 1 Prepleat 40-LPD Standard Capacity MERV 8-Air Filter (Case of 12)

This is a rugged, industrial grade disposable pleated air filter. It features a synthetic fiber filtering medium that is laminated to an expanded metal backing. This combination is then folded into an accordion pleat arrangement to increase filtering surface. This greater filtering surface allows more effective filtration while keeping airflow resistance low. The media pack is encased and sealed within a die-cut, moisture resistant frame. Performance level is MERV 8.|MERV rating: 8|Moisture resistant die-cut frame|Metal pleat backing|UL class 2|Filters bacteria, dust, mold and pollen|1-sided expanded metal backing|Sealed cardboard frame resists moisture and helps eliminate air bypass