1740 Protector Long CaseInterior: 1041 328 308 mm Exterior: 1122 409 356 mm Four extra deep base to lid locking cleats that ensure maximum stacking stability Open cell core, polymer wall construction Watertight, crushproof, and dustproof Wide track polyurethane wheels with ball bearings and nylon hubs Two Integrated Automatic Pressure Equalization Valves Two rugged double wide handles Stainless steel hardware and padlock protectors O ring seal From stargazing on the top of