The Pelican 1690 Transport Case with Foam (Black) is an unbreakable, watertight, airtight, dustproof, chemical resistant and corrosion proof hard case used to carry any kind of equipment that needs to be protected from the elements. It is made of Ultra-high Impact structural copolymer that makes it extremely strong and durable. It has a 0.25" (6.4 mm) neoprene o-ring, easy open, double throw latches that seal perfectly and includes an automatic purge valve for quick equalization after changes in atmospheric pressure.