The Pelican 1690 Transport 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. The neoprene o-ring and ABS latches seal perfectly and include an automatic purge valve for quick equalization after changes in atmospheric pressure.The Pelican 1690 case allows for easy and smooth transport by means of its heavy-duty, strong polyurethane wheels with stainless steel bearings, large two person fold-down handles, and retractable extension handle! It has an effortless release latch for the extension handle. The padlock protectors provide added strength and extra security against cutting and theft. It is NATO-codified and tested to MIL C-4150J (Military Standard).It is made from Ultra High Impact structural copolymer making it extremely strong and durable so that it is able to provide total protection against impact, vibration, ruggedness or shock for your equipment.