36mm 3 Blade CNC Aluminum prop for 4mm propeller shaft. This propeller fits 4mm smooth shafts that have a drive dog and is held on by a nut. Machine cut to high tolerances for use right out of the box. No need to balance these props.The Magnalium 7075 alloy makes this material upwards of 30% stronger than standard 7075 aluminum.Specs: 36mm diameter 1.4 pitch ratio1.98" (50.30mm) total pitch
