Pelican 0340 Camera Case With Foam (Black) 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. Pelican's Pick N'Pluck foam lets you customize the interior. Stainless steel reinforced padlock protectors Interior Dimensions (inches): 18.00 x 18.00 x 18.00 This product has wheels as a mobility package (0357) that would need to be purchased separately. Built-in/spring loaded pull handle Easy open Double Throw latches Open cell core with solid wall design - strong, light weight Watertight, crushproof, and dust proof