This Gator 19" Studio Rack cabinet is constructed from 5/8" thick MDF furniture grade black oak laminate. The Gato rack"s rails are 3.2 heavy-duty cold rolled steel with a 15.25" rackable depth.19" studio rack cabinets 5/8" thick MDF furniture grade black oak laminate Rack rails constructed of 3.2mm heavy-duty cold rolled steel 15.25" rackable depth