Fiber Patch and Splice Panel, Slide-Out, 4U, 12 Adapter Panel CapacityAdapter panels and splice trays NOT included. This fiber patch panel is only compatible with our FB24 adapter panel inserts and FB25 3996STA24 splice tray. To find out more, give us a call or email us. Description Fiber Patch and Splice Panel, Slide Out, 4RU, Holds Up to 12 Adapter Panels and 8 Splice Trays, 192 Splice Capacity, Steel, Black This rack mount fiber patch panel is a 4 Rack Unit (4RU), 12 termination panel, 19" and 23" rack mount fiber