I see that two types of aluminum are used for the Solar Stik™ Mount and Mast… why?
Aluminum is available in many grades, and should be chosen according to the application. We have selected T6061 and T5052 in the construction of the Solar Stik™ and mounts. High grade T6061 is used for rigid structures and T5052 is used for structures that may require custom shaping. The support arms on the Marine Transom Mount are T5052 so that a custom installation can be performed and the arms modified in a bending machine. The socket and mast assemblies are constructed of T6061, and therefore are rigid, not bendable. There is no conflict when these metals contact with one another and both are very strong.