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20 Ft Tunnel Containers Double door shipping containers or 20ft Tunnel Containers can be accessible on both ends. This feature significantly improves efficiency when loading and unloading cargo. They are typically found in a brand new 'one-trip condition. They are fabricated from a standard 40ft high cube container that has the bottom removed and a 5ft added with double doors. High Cube Double Door Tunnel Container The High Cube Double Door Tunnel Container is a distinctive shipping cont