Guardhouse Display Boxes#: GH-SLAB-W30. Size: 10 1/2x6 1/2x4 1/2 Color: Select Below. Sold Individually. This amazing universal wood box holds 30 PCGS or NGC coin slabs. Hand-made with real wood, this cherrywood color coin slab box accommodates ten certified coins in each of the three rows. The interiors are decorated with felt and the corners, on the inside, come with cushion pads to protect the wood.