The Pelican 1510 Carry On Case 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" (6.4mm) neoprene o-ring, and includes an automatic purge valve for quick equalization after changes in atmospheric pressure. It has a hinged case with double ABS latches that seal perfectly and padlock protectors that provide added strength.