Below is a list of Aluminum Enclosures manufacturers from San Luis Obispo, California. Aluminum enclosures house and protect electronic instruments or equipment from damage or interference. Because these enclosures can be used indoors and outdoors, they must protect their contents from a variety of weather conditions as well as from dust and dirt. If not shielded, electromagnetic interference (EMI) can also disrupt the performance of the circuitry inside the enclosures.