Perfect streamlined design, and adopts a variety of internationally latest patented technologies and two-wheel design, which is more smooth, quieter and more durable. ABS+PC material, durable and lighter hard shell, features textured finish to prevent against scratches. The beveled edge design on the upper part increases toughness for the luggage. Worldwide 2 year warranty.TSA lock which allows only TSA agents to inspect your bags without damaging the lock. Quiet airplane spinner wheels and an adjustable 3-level 100%pure aluminum telescoping handle allow you to quickly maneuver in tight spaces and it’s sturdier than most of the telescoping handle on the market. Three different size: Size: 20inch (22 x 8.9 x 15.2), 24inch (17.8 x 9.9 x 26.1) 28inch (20.1 x 11.8(13in when it is explandable)x 29.9).20inch and 24inch luggage is perfect for business and personal travel, 28in is expandable add 15% to the scalable space.