1510 Protector Carry-On CaseMaximum airline carry on size Strong polyurethane wheels with stainless steel bearings Watertight, crushproof, and dustproof Automatic Pressure Equalization Valve balances interior pressure, keeps water out Comfortable rubber over molded top and side handles Easy open Double Throw latches O ring seal Open cell core with solid wall design strong, light weight Retractable extension handle Stainless steel hardware and padlock protectors Sensitive