Whether you're wanting to pack light with the best suitcase or planning a vacation, go with luggage that's durable and easy to carry, please choose Coolife luggage! Features of the luggage Expand function 28inch is expandable for up to 15% additional packing capacity; 20inch is perfect carry-on, 24inch is ideal for personal or business trip. TSA Lock Mounted TSA combination lock provides peace of mind when checking cases through security. 3 different size 3 piece small, medium and large luggage set made from extra strong ABS material. More Details ABS for enhanced strength Solid, strong zippers Scratch-resistant finish 3-step telescoping handle Tough corner guard Soft-touch top and side handles Quality First Made of lightweight and durable 100% ABS material, with an impact-resistant hard shell, Molded corner guard reinforcements for absorbing and deflecting shock for maximum impact resistance. Sturdy Wheels Maneuver the luggage around with ease thanks to its four double spinner wheels. Unlike other rolling luggage that rolls just forwards and backwards—or other spinner luggage that have single versus double wheels, the COOLIFE spinner luggage offers superior strength and glides effortlessly in any direction. Small size 20inch (15.4 x 8.7x 22.4) is perfect carry-on. Travel days: 1~4days Capacity: 38L Weight: 6.7lbs Middle size 24in (17.7 x 9.8 x 26.4) is ideal for personal or business trip. Travel days:4~7days Capacity: 60L Weight: 8.1lbs Large size 28inch (20.9 x 11.4 x 30.3)(12.6in when it is expandable) is expandable for up to 15% additional packing capacity. Travel days: 7~9days Capacity: 93L(110L when it is expandable) Weight: 10.8lbs