1720 Protector Long CaseInterior: 1067 343 133 mm Exterior: 1127 406 155 mm Strong polyurethane wheels with stainless steel bearings Watertight, crushproof, and dustproof Open cell core with solid wall design strong, light weight Fold down handles Easy open double throw latches Stainless steel hardware and padlock protectors Automatic pressure equalization valve balances interior pressure, keeps water out O ring seal Sensitive equipment needs protection, and since 1976 the