The Pelican PL1740NF Long Case has two integrated auto pressure equalization valves that automatically equalize pressure in the case with the external pressure, so case will not be difficult to open when there has been a change in atmospheric pressure. Case is also equipped with two rugged double-wide handles, wide track polyurethane wheels with ball bearings for a smooth pull, corrosion resistant stainless steel hardware, and is watertight, crushproof and dust proof.