The Leviton Horizontal Cable Management System is a compact and efficient solution for organizing and managing cables in a 1RU space. Ituses slotted ducts to route cableWith dimensions of 1.5" x 3", this system by Leviton provides a secure and tidy way to route and store cables, ensuring a neat and professional setup for your networking or computer infrastructure.They mount onto a standard 19-inch equipment rack.The model number 210-491RU-HFO indicates the specific version of this cable management system from Leviton, designed to meet the needs of various networking and IT applications.