Type QS – Nibral propellers The state-of-the-art IPS propellers are developed, tested and manufactured with the highest precision to give outstanding efficiency, onboard comfort and maneuverability. The extremely strong and specially developed nibral (nickel-bronze-aluminum) alloy ensures minimum growth, excellent durability and corrosion resistance. • Outstanding efficiency, maneuverability and comfort. • Extremely strong nibral (nickel-bronze-aluminum) alloy. • Excellent durability, minimal marine growth. • Patented flow deflector minimizes pressure and wear on the propeller shaft seals. • Three-blade front propeller and four-blade rear propeller.