ABS PC Luggage Material: 100% virgin ABS+ PC film coating Size: 20"/ 24" / 28" Inner detail: fabric full lining + zipper cover + elastic cross belts Trolley: Aluminium Alloy, Built-in trolley system with push button Wheels: 4x360-degree silence spinner Wheels Without Expandable (Expandable can be done) Various colors are available Customized logos are accepted OEM ODM