?x?x.50" Flat Electrostatic Filter (Between 351-400 sq. in.)ECAS050400 $86.72 SKU: ECAS050400 Back $86.72 Quantity -+ Add to Cart Details ?x?x.50" Flat Electrostatic Filter (Between 351-400 sq. in.) DetailsBackDetails?x?x.50" Flat Electrostatic Filter (Between 351-400 sq. in.)See MoreSee Less