Pelican 1490 Laptop Case With Foam Fits notebook computers up to 17.3" L x 11.0" W x 3.3" D Double safety locking latches with keys Open cell core with solid wall design - strong, light weight Automatic Pressure Equalization Valve O-ring seal Pelican cases are kept watertight through the use of a tongue and groove fit and a polymer o-ring.^Pelican cases come standard with an Automatic Pressure Equalization Valve which releases built up air pressure while keeping water out.^Double safety locking latches with keys^Interior Dimensions (inches): 17.75 x 11.37 x 4.12