Expandable Capacity: 20in 24in and 28in luggages can expand for 25% more capacity. The 20in carry-on luggage is approved by airlines. It fits most airline overhead compartments and can be carried onto the airplane. TSA Lock and Durable Zipper: Protect your belongings with the built-in TSA lock. The Kunel zipper is resistant to being punctured by sharp tools, providing better protection for your privacy. Top Quality Luggage Sets: Made of brand new extra-thick ABS materials for hardshell, which make the suitcase more durable, lighter and impact-resistant. Features textured finish to prevent against scratches, keeping cases beautiful after a trip. 4 Rolling Silent Spinner Wheels: Kunel suitcase sets come with 4 detachable and straight shock absorbing wheels, ensuring quieter and smoother travel. Enjoy 360° free rotation and superior directional control for perfect maneuverability on any surface. Easy to Lift and Hold: The multi-level adjustable telescopic handle can meet the needs of different heights, and the one-button is easy to operate, stable and without shaking. The comfortable top&side handles make it easier to lift suitcase into the cargo compartment. Luggage Sets 5 Piece Suitcase Sets Suitcase with ABS Hard Shell Lightweight TSA Lock Double Spinner Wheels