Pelican 1610 Case with Foam Water Tight Copolymer Case with Foam and Wheels for Telescopes, Camera Gear and Optics (Black) (New in Box)

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. Foam : 1.3 pound polyurethane. Foam layers: layer 1 (lid): 2.00 inch - convolute / layer 2 (base): 1.50 inch - pad / layer 3 (base): 2.38 inch - pick N pluck / layer 4 (base): 2.38 inch - pick N pluck / layer 5 (base): 2.38 inch - pick N pluck. Pelican's Pick N'Pluck foam lets you customize the interior. Stainless steel reinforced padlock protectors. Polypropylene body Interior Dimensions (inches): 21.78 x 16.69 x 10.62.PURGE VENT: 3 Micron Hydrophobic Non-Woven