NEXUS CABINET SHELF （FIXED/300) 1U This Serveredge shelf is a 1RU cantilever mount fixed shelf and can support loads up to 20 Kgs. It is compatible with all standard 19-inch racks and cabinets This shelf comes included with the required mounting cage nuts and M6 bolts. Loading Capacity up to 20 Kgs Front Mountable Vented design for efficient air circulation