The StarTech.com advantage: StarTech.com offers a 2-year warranty and free lifetime technical support on this D-ring hook and has been the choice of IT professionals and businesses for over 30 years Easy mounting: Each vertical-mount server rack cable manager mounts to your two or four post rack to help organize networking cables and protect against equipment ports in your data centre IT grade: This 1U metal D-ring features a flexible opening for easy insertion of bundled cables and can be installed in multiple places on the same rack for custom solutions Passive cooling: This high-performance metal patch cable hanger keeps your computer and ethernet cords organized, improving airflow and reducing heat-related damage to equipment Protects equipment: This (2.2 x 3.9) Inch rack mount metal network rack cable management/organizer panel features solid steel for ultimate durability