Suitcase M size Aluminum Frame Carry Case TSA Lock Carry Bag Large Capacity Lightweight 360-degree Rotation Silent Double Caster Stylish Overseas Travel Business Trip School Trip (Silver, M size/46L) L33A Color: Silver Size: M size (39.5*25*57.5cm/46L) [New Release, Ultra-Lightweight, Large Capacity] 1. The surface material uses a three-layer structure of PC polycarbonate resin + ABS material, which is lightweight yet highly impact-resistant. Scratches are less noticeable even after long-term use. The popular aluminum frame is used, making it suitable for both business and casual settings. It is stylish and large enough for domestic travel and business trips. 2. Frame: Aluminum. Lightweight and easy to carry. Colors and design suitable for both women and men. [Two Dial-Type TSA Locks] Equipped with two world-standard TSA locks, making your outings safer while being stylish. A keyless dial lock allows you to set a 3-digit password, eliminating the worry of losing your keys. *The keyhole on the main body is for TSA staff inspection, so customers do not have a key. [Double Casters with Rubber, Silent & Smooth] It has double casters with two tires on one caster. Stability is improved, and 360-degree free rotation allows for smooth movement even on bumpy roads. In addition, special rubber is used in the casters to reduce rotational friction noise even on asphalt. [Lightweight & Portability] The aluminum frame suitcase is designed to be lightweight, reducing your burden and making your trip more comfortable. It also features an auto-reset handle and 360° silent casters, making it easy to move between the airport, Shinkansen, and buses.