【Materials】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. Popular aluminum frames are used, making it suitable for both business and casual settings. It's stylish and large enough for domestic travel and business trips. 2. Frame: Aluminum. Lightweight and easy to carry. Colors and designs suitable for both men and women. 【Sizes】The external dimensions of the SS size are 55*36.5*20.5cm, with a capacity of 35 liters, and the sum of the three sides is <115cm. It can be carried on board and is suitable for use in the cabins of Shinkansen, buses, and airplanes. The S size has a capacity of 42 liters and is suitable for 2-3 nights. The S size is lightweight and easy to use, and can be carried on board, but it only applies to some airlines, so it's best to check with the airline in advance. The M-22inch size has a capacity of 50 liters, suitable for 3-4 nights. The M-24inch size has a capacity of 60 liters, suitable for 4-5 nights. The L size has a capacity of 80 liters, suitable for 6-7 nights, and the XL size has a capacity of 100 liters, suitable for 7-10 nights. Choose the optimal size according to your travel or business trip needs. (Sizes include casters, side handles, locks, and side hooks.) *Please note that there may be slight errors in size measurements. 【Lock】Equipped with an international TSA lock. (The keyhole is for airport staff only. The key is for customs clearance and is not provided to the purchaser.) 【360° Rotating Casters】All wheels are 360° rotating silent casters. [Yuweijie] Suitcase Aluminum Frame Carry Case Carry-on Luggage Large Trolley Case Lightweight Carry Bag Silent Double Casters Impact Resistant Travel Business Trip TSA Lock with Hook Protective Cover, Silver M size 24 inches 4-6 nights 60L 1636 $$7000