?x?x.50" Flat Aluminum Foil Filter with Aluminum Frame (Between 351-400 sq. in.)HXAS050400 $50.80 SKU: HXAS050400 Back $50.80 Quantity -+ Add to Cart Details ?x?x.50" Flat Aluminum Foil Filter with Aluminum Frame (Between 351-400 sq. in.) DetailsBackDetails?x?x.50" Flat Aluminum Foil Filter with Aluminum Frame (Between 351-400 sq. in.)See MoreSee Less