Pass-through designed for the safe transfer of materials between environments with varying levels of contamination. The structure has no visible fasteners and is equipped with removable parts for ease of maintenance. The internally adjustable feet ensure stability and adaptability. Opening is controlled by a manual interlock system with red/green LED backlit buttons, which indicate the operating status and prevent simultaneous openings. Available with anti-XR protection (1, 2, and 3 mm lead) for environments with ionizing radiation.