A support arm system includes a socket for attachment to a surface and a support arm, for removable insertion in the socket. A plurality of guides are integrally formed with the walls of a header tank and are used to position an oil cooler inside the tank to align a pair of fittings carried by the cooler with a pair of spaced openings in the tank. The embodiments disclosed can be provided in a pre-assembled form to cosmetic companies and the like seeking to fill a dispenser with their fluid cosmetic products.