Lowell NR4P-4530 Four Post Networking Rack - 45U x 30"DThe four post networking rack provides full access to 19 inch electronics, such as routers and switches. the open design provides unrestricted airflow. This economical rack is ideal for telecommunications, equipment rooms, and similar network applications. Features Four double sided 12 gauge steel channel rails (3 in. deep) Holes tapped 12 24 on EIA spacing Numbered RU increments Multiple cable pass through points Grounding studs at top and bottom Two