Specifications Propeller Diameter: 7.5inch Pitch : 3.7 Blades : 3Material: PolyCarbonate Weight: 9.4gHub Diameter:15mm Hub Thickness:6.8mm Shaft:5mm Packing List 2 x CW HQProp 7.5X3.7X3 propeller2 x CCW HQProp 7.5X3.7X3 propeller