Polypropylene welded housing resistant to UV rays and adjustable to 8 positions. High-performance polypropylene impeller with forward curved blades, statically and dynamically balanced, incorporating a shielded aluminium reinforced hub. Gaskets from corrosive material providing protection against shaft/case leakage. Galvanised steel stool for B3 motors. Stainless steel external assembly fittings. Available with three-phase and single phase single speed motors, two-speed motors with IP55 protection or EEx-d protection.