O-ring sealed lid protects against moisture, dust and corrosive gasses. Dual purpose latches stabilize the lid and seal if dropped and automatically equalize interior pressure when opened. Twin 5/32 inch padlock loops. Non-slip rubber feet. High impact ABS case protects contents from crushing and is field repairable or easily modified for special projects Snap-on nylon strap handle with contoured rubber grip Stainless steel hinge (full width) and latch pins Instrument panel frame in base with 8 screw holes for OEM electronics devices Waterproof:1 meter for 30 minutes (IP67) Proudly made in the USA The 312 UltraBox is a water tight all weather mini-briefcase. With an interior that is only slightly larger than a standard letter it is deep enough to protect important documents, electronic tablets, phone, camera, etc. Accessory pluck-out foam pad layers can be added to adapt the case for sensitive electronics, gas analyzers,RF devices, etc. The o-ring seal will help to protect hand guns or special tools from rust and corrosive gasses. For OEMs a recessed frame will support an electronic instrument panel in the base.