ProX VAULTX XM-1102HW Medium Universal Watertight Case W-Extendable Handle, Wheels and Pluck-N-Pak FoamProX XM 1102HW VaultX Medium Universal Watertight Case W Extendable Handle, Wheels and Pluck N Pak Foam Description ProX's XM 1102HW VaultX Medium series cases are made from an extremely tough Polypropylene Copolymer, these cases are crush resistant and virtually indestructible. This rugged case features a sealed ring, which makes it Airtight and Watertight. The automatic air pressure release valve will equalize the air pressure, which allows this