Prevents Recirculating Hot Air from Harming Your Rack-Mounted EquipmentThis SmartRack® blanking panel kit is ideal for filling in unused rack spaces in your EIA-standard 19-inch rack enclosure. SR1UPANEL10 blanking panels close off unused rack openings, which improves cooling efficiency by optimizing airflow and preventing hot air from recirculating through your expensive equipment. Efficient cooling reduces operating costs, improves performance and helps your network equipment last longer.Easy to Install with No Tools NeededEach blanking panel’s rear tabs snap easily into the front mounting rails of your rack enclosure. No tools are needed. Each blanking panel occupies 1U of rack space. Ten blanking panels are included.