【Product Specifications】 Size: M size (24 cm) Color: Gray Width: Approximately 45cm Thickness: Approximately 27cm Height: Approximately 66cm (including casters) Weight: Approximately 3.1kg Capacity: Approximately 63L Material: ABS+PC 【About the Lock】 This is a dial lock, so there is no key for the customer. The initial number is set to "0-0-0". It is a type that opens and closes by aligning the dial. The keyhole is for TSA use. 【About the Casters】 All 4 wheels are removable. You can store it even more compactly when not in use. 【With a Convenient Cup Holder】 You can easily hydrate, and it folds away for storage on the body when not in use. 【About Carry-on Luggage】 Please note that this varies depending on the airline. Please check with the airline you will be flying with based on the size information on the product page. 【360° Rotating Silent Casters】 Easy to change direction and move smoothly. Equipped with casters that reduce running noise and improve durability. 【Ultra-lightweight, Highly Durable Body】 Easy for women to carry, and the material is lightweight and very durable.