20 ft side-opening shipping container Container configurations / 20 ft side-opening shipping container Configurations for 20ft side-opening containers with SHARKCAGE. Move the cage into the container and close the door. TACTICAL LOCKER MEDIUM Kit SC-TL-MD-20-81 Kit for outfitting a side-opening 20ft ISO container with TACTICAL LOCKER MEDIUMs. TACTICAL LOCKER SMALL Kit SC-TL-SM-20-81 Kit for opening a 20ft dual-side-opening ISO container with 8 ea TACTICAL LOCKER Smalls. metric / US (imperial)