"59576" is no longer available online, but still supported by FS. For more details, please refer to the End of Sale Policy.
The similar product is recommended as below for your reference.
Detachable Front and Rear Cable Managers
Detachable Front and Rear Cable Managers, Used Separately for Cabling
Compatible with All FHD Cassettes and Panels
Up to 144 Fibers (LC) or 1,152 Fibers (MTP®-24)
Space Saving 1U Design, Mount to Standard EIA 19" Rack Rails
166 In Stock, U.S. Warehouse
Get It By Tue. Jul. 5