Material: Corrosion-resistant steel.2. Discharge pattern can adjust to 1, 2, 3 or 4-way horizontal, before or after installation. Discharge pattern is adjusted by dropping the perforated face and rotating the pattern deflectors. Diffusers are shipped from the factory with a 4-way discharge pattern.3. Removable face has concealed latches for easy access to core and optional damper.4. Perforated face has 3/16" diameter holes on 1/4" staggered centres.5. Excellent performance in VAV systems. 6. Standard finish is AW Appliance White.