16x25 Nominal Upflow/Horizontal Furnace Filter Base; Holds 1", 2" & 4" standard size filters.EZ-1625S $156.44 SKU: EZ-1625S Back $156.44 Quantity -+ Add to Cart Details 16x25 Nominal Upflow/Horizontal Furnace Filter Base; Holds 1", 2" & 4" standard size filters. DetailsBackDetails16x25 Nominal Upflow/Horizontal Furnace Filter Base; Holds 1", 2" & 4" standard size filters.See MoreSee Less