Purolator HE-40 14x14x1 Merv 8 Pleated AC Filters and Furnace Filters High Dust Holding Capacity Actual Size: 13-3/4 x 13-3/4 x 3/4 $5.39 Each - 1 Case of 12 Total $64.68 The Purolator HE-40 Provides 90-93% Average Arrestance and Maximizes Dust Retention Capabilities