The Low-Cost, Cast Aluminum Enclosure. Bud offers 15 box sizes, each with close fitting flange covers fastened to bosses in the body with screws. This plus thickness of the #ADC-10 aluminum alloy offers excellent screening properties. These lightweight, easy to machine enclosures have a number of uses — instrument and meter cases, filter networks, junction bosses switching and many other applications requiring a small box. In addition, they are ideal for concealed or other interior use where a safety closure is necessary.