Propeller Diameter: 5.1 inch       Pitch : 3.1                 Blades : 3 Material : Poly Carbonate        Weight : 4.7g Hub Diameter : 13.2mm           Hub Thickness:7mm           Shaft :5mm Adaptor Rings : NO Includes 2 x CW HQProp 5.1X3.1X3 propeller 2 x CCW HQProp 5.1X3.1X3 propeller