Use the Tripp Lite 1U Blanking Panel Kit to improve cooling efficiency by filling unused rack space. By doing this, you will be able to direct the circulation from your intake air flow and optimize the cooling design. The mounting feature on the Tripp Lite rack allows for easy installation and convenience and requires no tools to complete. Tripp Lite 1U Blanking Panel Kit:19"1UIncludes 50 pieces to fill from one to 50U of rack spaceOptimize airflow when you use this server rack panel kit