Rack Tech Cantilever Fixed Shelf End Mount Vented for 2-post or 4-post Rack 19-inch Rack Mountable (Rack Mount) Shelves SMP Data Communications (Rack Technologies) PLP Preformed Line Products SH2E-3U-RT-9023V Comments: SMP/RACK TECH Cable Management: 19-inch shelves perfect for all telecom closet applications. Support Specifications: Cable Management: Steel Construction with Black Powder-Coat Finish. Measurements & Weights: Rack Units: 3 Rack Width: 19" Width: 18" Height: 5.25" Depth: 15.5" Shipping Weight: 6 lbs