Fiberglass tower casing, basin, and air inlet louvers have a smooth exterior gel coat with UV inhibitors. E2F Series towers are built using completely non-ferrous materials. Large, non-clogging ABS nozzles are used to uniformly distribute water across all fill surfaces. Adjustable pitch, high efficiency, fiberglass reinforced polypropylene fan blades with a cast aluminum alloy fan hub and a heavy duty TEAO (Totally Enclosed Air Over Motor) fan motor with permanently lubricated motor bearings promise longevity and performance.