Guardhouse Display Boxes#: GH-1400W3. Size: 10.5x5.25x1.5 Color: Mahagony. Sold Individually. This three slab universal wood display box is designed to hold three certified coins from any of the major grading services. Hand crafted from solid wood, this sturdy mahogany Guardhouse box has a black foam interior around the coin slab, a white cushion pad and a black ribbon on the lid's interior, to give the certified coins a neat setting. Interior foam cut-outs for each slab measures 2 3/8 x 3 1/4.