This Beduan pipe fitting has tubing connectors. It is suitable for copper, brass, aluminum, and steel tubing. The fitting can be used in fuel equipment, plumbing, gas, refrigeration, and vacuum applications. Pipe union fittings are components used for connecting, terminating, controlling flow, and changing the direction of pipe. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness)