Viagdo Luggage Carry-On Luggage HardSide Suitcases Hard Shell Lightweight Spinner Luggage 21 Inches Lightweight Design Luggage: Extremely light, refused to increase traveling load. Save time and effort, making it easy to travel. Imported New APS+PC Material: Has considerable malleability and impact ability. Security at 40 degrees to 100 degrees below zero. Mute 360 degree Aircraft Wheel: Double row of mute 360 aircraft wheel with natural rubber not easy to wear, rotate and run more smoothly. Boarding Luggage Superflex hard shell: 21 inches, 50L capacity. Realized greater capacity than average trolley suitcases, increase 30% space in a limited volume. TSA Customs Lock: Use international customs globally universal TSA private key. Easy to lock and open safely, always protect your beloved luggage.