5 D-rings for minimal cable and fiber bend in cabinets and racks Made from black powder-coated, 18-gauge cold rolled steel for durability 19-in. EIA 310D compliant Includes mounting hardware 2U 2U cable capacity (fiber): 274 (based on 50% fill rate) 2U cable capacity (CAT-5E): 107 (based on 50% fill rate) 2U cable capacity (CAT-6): 69 (based on 50% fill rate) 2U cable capacity (CAT-6A): 37 (based on 50% fill rate) 2U dimensions: 3.5 in. H x 19 in. W x 2.56 in. D