Propeller Diameter: 4 inch Pitch : 2.5 Blades : 2Material : Poly Carbonate Weight :1.45gHub Diameter : 9.8mm Hub Thickness:5mm Shaft :1.9/1.5/1.9mm Adaptor Rings : NOIncludes2 x CW HQProp T4X2.5 propeller2 x CCW HQProp T4X2.5 propeller