Large cases and bags can be divided into two categories: soft cases and hard cases according to their different materials. The hard box includes an ABS (styrene polymer) box and a PP box (injection molding), and the softbox generally refers to an EVA (high-density foam) box. The ABS box has the characteristics of moisture-proof and pressure-proof, so even if it rains or snows, you don’t have to worry about the contents of the box becoming damp and damp, and due to the material used, the box itself does not have a great degree of expansion and contraction, so it is suitable for storage Valuable items such as cameras, cameras, etc., in case the box is subject to external impact, the items in the box will not be easily damaged. Its lock is a combination lock with a side lock.

　　Another kind of hard box PP box is produced in a mold, so the fastness is better than the ABS box. This is its biggest feature, and other features are roughly the same as abs luggage sets. EVA softbox is different. It is characterized by its small weight, that is, the weight of the box itself is lighter, and the box has a certain degree of expansion. It can hold more items than the ABS and PP boxes of the same specification, so the capacity Large, light and convenient are its biggest advantages. Its lock is a combination lock without a side lock. Some models don't even have a combination lock, and the user needs to add a lock.

　　According to the different performance of the boxes, they can be divided into air suitcases, trolley cases, and briefcases. Suitcases and briefcases generally have a length greater than a width and a height, while a trolley case is different. Its height is greater than its length and its width. The characteristic of the suitcase is that it is equipped with a handle at one end, which can be lifted and pulled, and it is convenient to run, especially suitable for narrow aisles. As the name suggests, the trolley case has a built-in trolley. The user can pull the trolley out longitudinally in several sections just by pressing the button, and it can be pulled away like a luggage cart. Its advantage is that it is light and labor-saving. The briefcase is very popular among consumers for its small size and convenient carrying.