Includes 10 pieces to fill from one to 10U of rack space. Improves cooling efficiency inside the enclosure by filling unused rack space and optimizing airflow and preventing re-circulation. Offers toolless mounting and fits any square hole, EIA compliant enclosure. Manufactured in compliance with strict RoHS specifications.Package Includes: (10) One-Unit Panels; InstructionsNote: This is a non-returnable item.