This large desiccant port is fitted with a split level humidity indicator (30%/50%) and two way pressure relief valve with manual override button for safe container opening. The unit can hold a number of desiccant sachets which can easily be changed out without having to fully open the container
Combining all these items helps to reduce space taken up on the container and the amount of hole cutting required.
These items are commonly used along with Observation Ports and Document Ports.