Model Series DCF Ceiling Mounted Displacement Diffusers are suitable for Lay-in T-Bar suspended ceiling applications. Constructed of heavy gauge corrosion-resistant steel, the design features an extruded aluminum flat perforated face with mechanically locked mitered corners for added strength. This Lay-in style diffuser installs quickly and easily in a standard T-bar ceiling. Ideal in applications where there is no room for wall or floor mounted diffusers.