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. Int Volume- 3.08 ft³ (0.087 m³) Stainless steel reinforced padlock protectors and minimum temperature is -40 degree Fahrenheit (-40 degree Celsius) and maximum temperature is 210 degree Fahrenheit (99 degree Celsius) Exterior Dimensions (L x W x D) - 31.59 x 20.47 x 12.45 in (80.2 x 52 x 31.6 cm) Interior Dimensions (L x W x D) - 28.57 x 17.52 x 10.65 in (72.6 x 44.5 x 27.1 cm). Latch: ABS WEIGHT WITH FOAM: 28.06 pounds / WEIGHT EMPTY: 24.03 pounds / BUOYANCY: 181.00 pounds. Foam Layer 1 (Lid)-1.75 (Convolute), Foam Layer 2 (Base)-3.75 inch-Pick N Pluck (.63 inch x .63inch squares), Foam Layer 3 (Base)-3.75 inch (Solid), Foam Layer 4 (Base)-1 inch Solid