Specifications Propeller Diameter: 7.5inchPitch : 3 Blades : 3Material: Poly Carbonate Weight: 10.9gHub Diameter: 14mm Hub Thickness: 7mm Shaft: 5mmAdaptor Rings: NO Packing List 6 x HQProp 7.5X3X3 propeller CW6 x HQProp 7.5X3X3 propeller CCW