?x?x.50" Flat Electrostatic Filter (Between 451-500 sq. in.)ECAS050500 $93.84 SKU: ECAS050500 Back $93.84 Quantity -+ Add to Cart Details ?x?x.50" Flat Electrostatic Filter (Between 451-500 sq. in.) DetailsBackDetails?x?x.50" Flat Electrostatic Filter (Between 451-500 sq. in.)See MoreSee Less