A Dynamic Pass Box is a type of specialized airlock used in cleanrooms and other controlled environments to transfer materials or samples between two areas while maintaining the integrity of the controlled environment. They are typically used to transfer materials between areas of different cleanliness levels or between areas with different air pressure differentials. These are designed to prevent the entry of contaminants into the clean space during the transfer of materials. The design and features of Dynamic Pass Box will depend on the specific application and the size of the cleanroom or controlled environment.