Nailor Model 1604DD 18×18 Louver Mill Finish w/removable Flange Nailor Model 1604DD 18x18 Louver Mill Finish w/removable Flange Nailor Model 1604DD 18×18 Louver Mill Finish w/removable Flange Category: Louvers Sub-Categories: Next Product CURB-SEISMIC-16.5