Pelican 1200 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 hardware Interior Dimensions (inches): 9.25 x 7.12 x 4.12 LID DEPTH- 1.18Inches (3 cm). BOTTOM DEPTH- 2.93 Inches (7.4 cm). TOTAL DEPTH- 4.11Inches(10.4 cm). TOTAL DEPTH- 4.11 Inches (10.4 cm). INT VOLUME- 0.16 ft (0.005 m) 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. Single folding front handle