It starts with ultra tough UV stabilized Delrin™ 507 (acetal co-polymer) plastic, 304 stainless steel, and corrosion resistant anodized 5052-H32 aluminum. The internal potentiometer has 360° rotation, 355° electrical angle (5° dead-band), a machined aluminum body, and an integrated ball bearing. Besides the potentiometer bearing, there is also a precision stainless steel ball bearing. Metal Oxide Varistor (MOVs) help protect the wind vane against lightning and static buildup. All of the machining, anodizing, assembly, and testing of the wind vane is done in the USA. The wind vane comes with a rubber