In the case of the offset dish, the LNB does not project any shadow on the reflector. In this case, the focal point (point in the reflector at which the reflected signal aims) is not placed in the centre but on the side, which allows for optimum performance.
Aluminium being the most abundant metal on earth's crust, and 100% recyclable, Televes thus meets its own requirements in terms of respecting the environment. It is perfect for antennas, given its high lightness and stability, and the fact that it is a good conductor, resistant to extreme variations in temperature, corrosion and ultraviolet radiation.