Propeller Diameter: 7.5inch Pitch : 3.7 Blades : 3Material : Poly Carbonate Weight : 9.4gHub Diameter :15mm Hub Thickness:6.8mm Shaft :5mmAdaptor Rings : NOIncludes2 x CW HQProp 7.5X3.7X3 propeller2 x CCW HQProp 7.5X3.7X3 p propeller