The Premium 1U or 2U Rack Mount Brush Panel from Rocstor is a cable pass-through panel with a brush strip. Inside server cabinets and rack enclosures, the brush strip prevents unwelcome airflow. This product increases cooling effectiveness and separates the cold and hot aisles. The SolidRack Brush Panels are made from heavy-duty cold-rolled steel, and on top of that, they are finished with a durable black powder coated finish, which will coordinate perfectly with other SolidRack products.