Purolator HE-40 14x24x1 Merv 8 Pleated AC Filters and Furnace Filters High Dust Holding Capacity Actual Size: 13-3/8 x 23-3/8 x 3/4 $5.52 Each - 1 Case of 12 Total $66.24 The Purolator HE-40 Provides 90-93% Average Arrestance and Maximizes Dust Retention Capabilities