3-level Pick N PluckTM with convoluted lid foam Watertight, crushproof, and dustproof Open cell core with solid wall design-strong, light weight Large 2-person fold down handles Retractable extension handle Easy open double-throw latches Stainless steel hardware and padlock protectors Automatic Pressure Equalization Valve balances interior pressure, keeps water out 4 strong polyurethane wheels with stainless steel bearings Retractable extension handle O-ring seal Available with foam (WF) or no foam (NF) and with logo (WL) or no logo (NL) 1664 protector cases include padded dividers.