"51607" 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.
Transparent and Removable Hinged Doors
Sliding Drawer for Full Front Access in All Installation Situations
Compatible with All FHD Cassettes, Panels, and Splice Trays
Up to 144 Fibers (LC) or 1,152 Fibers (MTP®-24)
Space Saving 1U Design, Mount to Standard EIA 19" Rack Rails
112 In Stock, U.S. Warehouse
Free Shipping, Get It By Tue. Jun. 28