Enclosed areas called "environmental chambers port holes" are used to imitate different environmental factors including temperature, humidity, light, and pressure. Applications for these chambers include product testing, research and development, and quality control. Environmental chamber Port holes are small, circular openings in the chamber walls that allow access to the interior of the chamber without disturbing the environmental conditions inside. These ports are typically made of durable materials such as stainless steel or acrylic and are designed to withstand the rigours of repeated use.