Gator Cases Wooden Studio Rack; 4U Size with 15.25" Depth - Black (GR-STUDIO-4U) 19" Studio rack cabinet / 4U Rack Size (7") 16.3mm thick MDF furniture grade black oak laminate, easily constructed Rack rails constructed of 3.2mm heavy duty cold rolled steel Tapped Rails - No need for Cage Nuts 15.25" Rackable Depth