Built - in Base More Compact than Universal Mantels Fits White Mountain Hearth Fireplaces without Modification Proudly Made In USABase Depth: 16.25 Base Height: 3.25 Base Width: 41 Cabinet Depth: 14.63 Cabinet Width: 39.5 Height: 41 Inside Depth: 14 Opening Height: 30.5 Opening Width: 30 Top Depth: 17.25 Top Width: 45.38