Cases
Pelican cases are molded plastic containers that seal with an airtight and watertight gasket. Pelican cases include a barometric relief valve made of Gore-Tex to prevent pressure damage to the case, during transportation or when the air pressure in the environment changes. Pelican cases meet standards for waterproofing, stacking, impact, and durability including MIL-STD C4150-J for waterproofing, IEC IP67 rating indicating complete sealing against dust and water immersion to 1 metre, as well as ATA 300 rating indicating compliance with Air Transport Association standards for durability in shipping. Pelican cases feature a lifetime guarantee. In Europe, they are sold as Peli cases due to the name "Pelican" being trade marked by another company.
If the case falls into water, generally there will be enough air in the case to keep it afloat. The barometric relief valve permits air to pass through, but not water or other liquids. Under some extreme conditions leakage is technically possible, but such conditions are unlikely to be encountered, except in the case of deliberate vandalism.
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