1610 Protector CaseStrong polyurethane wheels with stainless steel bearings Watertight, crushproof, and dustproof 3 level Pick N Pluck with convoluted lid foam Automatic Pressure Equalization Valve balances interior pressure, keeps water out Easy open Double Throw latches Fold down handles O ring seal Open cell core with solid wall design strong, light weight Retractable extension handle Stainless steel hardware and padlock protectors Sensitive equipment needs