Tripp Lite's SmartRack SR1UBRUSH is a 1U cable pass-thru panel with brush strip. The brush strip blocks unwanted airflow inside rack enclosures and server cabinets. The SR1UBRUSH improves cooling efficiency and segregates cold aisle from hot aisle. 1U cable pass-thru panel with brush strip Brush strip blocks unwanted airflow inside rack enclosures and server cabinets Improves cooling efficiency and segregates cold aisle from hot aisle