SKB 3I Series Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene copolymer resin, featuring a gasketed, water and dust tight, submersible design (MIL-C-4150J) that is resistant to corrosion and impact damage. Features a molded-in hinge, patented "trigger release" latch system, comfortable, snap-down rubber over-molded cushion grip handle, automatic ambient pressure equalization valve (MIL-STD-648C), resistance to UV, solvents, corrosion, fungus and impact damage (MIL-STD-810F) Features Cubed foam for customization Four wide set in-line skate style wheels for easy transport TSA accepted key locking latches are available Padlock holes include stainless steel padlock protector clips Waterproof and dust tight design (MIL-C-4150J) Molded-in hinge for added protection Trigger release latch system Snap-down rubber over-molded cushion grip handleAmbient pressure equalization valve (MIL-STD-648C) Resistant to UV, solvents, corrosion, fungus (MIL-STD-810F) Resistant to impact damage (MIL-STD-810F) Interior Dimensions: 30 x 21 x 18", 2" Deep Lid, 16" Base Exterior Dimensions: 33 x 23.5 x 18.88"Weight: 37lb (with foam)