... elastic belts Trolley: Aluminium, Built-in trolley system with push button Wheels: Four 360-degree Wheels Without Expandable (Expandable can ... Hardside (ABS) - Luggage is made of Strong ABS plastic, a temperature-resistant, highly impact-resistant material, is combined ... material is made of polycarbonate, a highly impact-resistant plastic that is strong and lightweight.Four, multi-directional Spinner ...