Propeller, 20 in Propeller Dia. (In.), 3697/2588 CFM @ 0.000-In. SP, Aluminum Blade Material/ DIAMETER: 20.000 INCHES NOMINAL BLADE QUANTITY: 3 ATTACHMENT METHOD: SETSCREW ROTATION DIRECTION FOR WHICH DESIGNED: CLOCKWISE HUB LOCATION: FRONT MATERIAL: ALUMINUM OVERALL STYLE DESIGNATOR: 1 ROUNDED TIP