When Overhead Door Corporation's side-folding full closure grilles are ideal for applications that require a secure barrier against theft and debris, such as retail applications in malls and airport concourses. The full closure side folding grille line includes four panel materials: perforated steel, clear polycarbonate, tempered glass and aluminum. All four models are available in both standard-body and wide-body versions.
Model 678 features tempered glass for a crystal-clear view and high durability. Visibility: 100% of 4-3/4" (121mm) viewable area.