Merax Dreamy ABS+PC 3 Piece Expandable Luggage Set with TSA Lock (Silver) One set 3 pieces: Designed to provide travelers comfort, functionality, reliability, and peace of mind, this 3 piece suitcase set features one 28inch suitcase for consignment, one 24inch suitcase for checking in and one 20inch suitcase suitable for carrying onto the plane. PC+ABS material: More durable and lighter PC+ABS material, brings together the advantages of both materials. It makes the luggage more durable, flexible and absorbs impact when under stress while more shining and beatiful. Dual Spinner wheel&amp;Dreamy Aluminum Trolley: Multi-directional silent dual spinner wheels rotates 360 degrees for easy maneuverability while sturdy ergonomic aluminum handle rodwith adjustable 3-step telescoping system provides fluent and smooth experience. TSA Approved Lock (no key): The combination lock is TSA Approved allowing the US Transport Security Association to inspect your luggage without having to damage your locking mechanism. There is no TSA key included and you may set the combination lock with instructions. Dreamy Elegant Interior: The interior is fully lined with multi-use organizational pockets make it easy for packing clothes. Elegat pattern makes your packaging time more pleasing while hidden zipper design will not scratch your personal staff. Note: One set (3 pieces) will be shipped fits inside each other which offers more inconvenience and save much space for storage. Approx. Dimension(excluding wheels): S 18&#039;&#039;x14&#039;&#039;x9&#039;&#039; , M 23&#039;&#039;x18&#039;&#039;x10&#039;&#039; , L 27&#039;&#039;x19&#039;&#039;x12&#039;&#039; Approx. Dimension(including wheels): S 21&#039;&#039;x14&#039;&#039;x9&#039;&#039; , M 26&#039;&#039;x18&#039;&#039;x10&#039;&#039; , L 30&#039;&#039;x19&#039;&#039;x12&#039;&#039; Approx. Weight: S: 6.7 lbs M: 8.6 lbs L: 10.7 lbs Approx. shipping weight(One set, 3pieces): 28 lbs The lock is Pre-set to 0-0-0. Push the tiny button on the broadside, while in this position set each number to your selection. Release the button and your number is now set. Take care when setting the numbers and do not release the button while setting it.