The 1400 Case from Pelican is the world's toughest watertight protective cases. Pelican cases feature an exclusive 1/4 neoprene O-ring to guarantee a perfect seal. Neither dust nor water can penetrate this barrier. All Pelican cases are absolutely airtight. The exclusive built-in O-ring sealed pressure purge valve allows for quick equalization after changes in altitude or temperature. . 19428015602 29939600006 330550