HQProp Racing Prop R42 (4pcs)

Propeller Diameter: 5.1inch       
Pitch : 4.2               
Blades : 3
Material : Poly Carbonate        
Weight :4.9g
Hub Diameter :13mm           
Hub Thickness:7mm           
Shaft :5mm（ Compatible with POPO motor)
Adaptor Rings : NO