Starmax Propeller Adapter for E-Flite Power 46/52/60 Series Outrunner Included: 1 - CNC Machined Starmax Power 46/52/60 Propeller Adapter, Hex Nut, 3 Mounting Screws Use with Starmax 1600mm models For hubs with 8mm hole Run the factory Hub / Prop assembly for that scale look CNC Machined from Billet Aluminum