Lightweight and durable pp material: resistant to pressure and drops, not easily deformed, and safer for long-distance transport.multi-piece set design: one set can meet family or business travel needs, allowing for flexible carry-on and checked baggage combinations.save on shipping costs: multiple sets can be nested for packaging, resulting in a smaller container size, making them suitable for export and wholesale.silent, smooth-glide wheels: 360° universal wheels offer effortless rotation, stability, and quiet operation.customizable services: oem/odm services are available, including logo printing, packaging customization, and color customization.