3551-145-21 – Stainless Steel Propeller. Provides great stern lift and acceleration. High blade rake with large suction cup design for high efficiency at higher speeds and minimizing cavitation under heavy loads. Delivers powerful boost and very smooth performance. Greater speed and fuel efficiency in mid-range engines. Durable rubber bushing softens shifting and won't slip. Sola Industries stainless steel propellers feature the highest percentage of chromium, nickel and molybdenum materials to resist saltwater corrosion and increase the stability of the propeller blades.