2-Pack of 1U 19" Vented server rack shelves; Cantilever style mounting - Durable 16-gauge SPCC cold-rolled steel; Total weight capacity of 44lb/20kg - EIA/ECA-310 compliant for use in standard 19-inch server racks - 15.7in (40cm) deep; Suitable for data/networking/non-rackmount equipment - Vented design enhances airflow and heat dissipation - Includes cage nuts/screws and washers for mounting - 1U vented server rack mount tray is backed for life including free lifetime 24/5 technical assistance