This heavy-duty Guardhouse coin slab box, with double row, measures 12 x 5.75 x 3.25 and holds 31 certified coins or coin slabs in each row. Manufactured with a high quality textured exterior, the Guardhouse heavy duty double row slab box features re-enforced tape filaments, which give the box extra strength and durability. Guardhouse heavy duty slab boxes are colored black and are designed to fully enclose the coin slabs when placed inside. This makes the Guardhouse heavy duty slab boxes ideal for storing, shipping and transporting PCGS and NGC certified coins or Premiere coin slabs. Boxes are made in the USA.