Peli Case 1640 Protector Transport CaseInterior: 602 610 353 mm Exterior: 691 699 414 mm 4 strong polyurethane wheels with stainless steel bearings Retractable extension trolley handle Fold down handles Watertight, crushproof, and dustproof Open cell core with solid wall design strong, light weight Easy open double throw latches Stainless steel padlock protectors Automatic pressure equalization valve balances interior pressure, keeps water out O ring seal Sensitive equipment needs