Ultra-high vacuum (UHV) chambers are used in many scientific and industrial applications, including material science, surface analysis, and thin film deposition. These chambers are designed to maintain an extremely low-pressure environment, typically less than 10^-9 torr, to prevent contamination of the sample or surface being studied. Transfer tunnels are used to transport samples or materials between different chambers in a vacuum system without exposing them to air. They are typically made of stainless steel or other materials that are compatible with high vacuum environments. Together, UHV chambers and transfer tunnels provide researchers and engineers with the ability to study and manipulate materials at the atomic and molecular level, enabling a wide range of applications in fields such as nanotechnology, electronics, and biotechnology