The AmAir 1100 is a MERV 11 air filter that offers premium performance and construction in 1", 2", and 4" pleat depths. It has an expanded metal support grid laminated to the media pack to increase rigidity and maintain pleat spacing. Excellent as a prefilter or final filter, the AmAir 1100 will work in any application where an extended surface, pleated panel is currently in service.