https://squareblogs.net/stitch....camera2/40-ft-tunnel
Shipping Container Tunnel Shipping container tunnels, also called double-end doors, have typical double doors on both sides of containers. When opened, they create a tunnel. This facilitates easy access, and greatly enhances the ease and convenience of loading and unloading freight. Tunnel containers are available in a new "one-trip" condition and are suitable to complete a variety of storage and conversion projects. Many customers use tunnel containers to build small stores to store