ProSpin 4.5" Bar-Stock Aluminum Spinner for 3-Blade Propellers PS 450ProSpinBar Stock Aluminum Spinner with brushed metal finish! ProSpin spinners are made from high quality barstock for strength. They won't crack like cheap cast aluminum spinners do. ProSpin spinners are also 30% lighter than cast aluminum. All spinners include a shaft bushing, prop nut, and bolt. All spinners are polished to a brushed metal finish. Notes on Ordering: 1. Find out the size of the prop nut you need. The size of the included prop nut is