Watertight high impact military grade polypropelyne case with air lock and custom foam insert designed to hold and protect your most valuable coin slab collection. This box comes with rubber holded handle and a high impact shell that features 0-ring seals and automatic pressue equalization value to maintain interior pressure, while keeping water out. The foam core insert is custom cut to perfectly hold PCGS and NGC slab. For the high end collector, there is no better way to store or transport your collection. Holds 48 coin slabs.