373706 Specifications: Item Name:Self-locking Propeller Model:5030 Material:Nylon Length: 5.0 inch Screw Pitch: 3.0 inch Central Hole Diameter: 5mm Usage:for Universal 5mm shaft diameter's motor Package list: 5030 positive self-locking paddle paddle * 2 5030 anti-self-locking paddle paddle * 2 Original packaging