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20 Ft Tunnel Container A 20 ft tunnel container is an ISO standard shipping container with double doors at both ends (double ender). These containers are taller than conventional storage containers. They can be used as storage containers, to transport, or to create an area for living or a workshop. They also come with high cube options which are 9ft 6in instead of the standard 8ft 6in height This allows for more headroom inside for higher-heig