Floats in salt water with 7 lbs (3.2 kg) load. Interior Dimensions: 7.25' x 4.75' x 3.06' (18.4 x 12.1 x 7.8 cm). Watertight, crushproof, and dust proof. Open cell core with solid wall design - strong, light weight. O-ring seal. Automatic Pressure Equalization Valve. Stainless steel hardware. Pick 'N' Pluck with convoluted lid foam. Unconditional Lifetime Guarantee of Excellence Exterior Dimensions: (L x W x D) 8.12' x 6.56' x 3.56' (20.6 x 16.7 x 9 cm).