?x?x.50" Flat Electrostatic Filter (Between 401-450 sq. in.)ECAS050450 $90.24 SKU: ECAS050450 Back $90.24 Quantity -+ Add to Cart Details ?x?x.50" Flat Electrostatic Filter (Between 401-450 sq. in.) DetailsBackDetails?x?x.50" Flat Electrostatic Filter (Between 401-450 sq. in.)See MoreSee Less