This suitcase is an aluminum-framed suitcase, which refers to the design of the opening being aluminum. The main material is ABS+PC. This is a high-grade synthetic plastic, ABS PC material combines the hardness of ABS and the toughness of PC, which can effectively resist the impact of the outside world, protect the safety of the contents of the box, and at the same time deform moderately when subjected to pressure, reducing the risk of breakage