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Tunnel Shipping Containers These are brand new (one-trip) shipping containers that have double cargo doors on each side. This makes it easier to load and unloading. It is an excellent choice when you want to build a structure that has two entrance points, such as tunnels or bridges. These shipping containers are also equipped with fork pockets that can be used by industrial forklifts of large size. They also have at least two air vents, which ensures a good airflow throughout. Ea