BDI Icon 9422, 6-Shelf AV Tower, Gloss Black (Discontinued by Manufacturer) High-Strength Glass -- Sturdy shelves of virtually shatter-proof, tempered safety glass to safely support heavy loads. Cable Management -- Keep cables organized with an integrated cable-management system. Adjustable Shelves -- Position shelves at varying heights to suit your preference and accommodate additional or larger components. Flow-Through Ventilation -- Vented design allows air to circulate up through bottom panel and between shelf compartments. Heat vents out through the back panel, keeping hot-running components cooler.