Virtually indestructible, the Fluke CXT1000 extreme hard case has innovative features for unmatched strength and durability. The CXT1000 offers maximum protection for your Fluke tools and accessories against high impact, vibration or shock. O-ring sealed, waterproof up to a depth of 3 feet,airtight, and built to withstand the most extreme conditions. The CXT1000 is great for airline travel with an automatic pressure equalization valve for changes in atmospheric pressure.