These cases are the best insurance you can buy for your valuable camera gear, instruments,meters, gauges, precision tools, guns and expensive equipment. Unbreakable and "O" ringsealed - guaranteed airtight, watertight and dustproof. All Pelican cases are built to take a beating.Layers of exclusive pick `n pluck foam padding cushion equipment against rough and tumbleabuse. Won't dent or corrode, even in or around salt water. Exclusive permanent automaticpurge valve contains Gortex type material to prevent moisture from entering the case andallows the automatic release of pressure in the case. Super tough molded handles. Made of Borg-Warner Cycolac ABS Structural Resin. Unconditional lifetime guarantee.