HQ Ultralight Whoop Prop 1.2X0.9X4(31MM) Grey (2CW+2CCW)-PC-1MM Shaft

Here is what the manufacture has to say:

Propeller Diameter : 1.22 inch(31mm)    
Pitch : 0.9                              
Blades : 4
Material : Poly Carbonate        
Weight : 0.22g
Hub Diameter :4mm         
Hub Thickness : 5mm        
Shaft : 1mm 
Adaptor Rings : NO

Includes
2 x CW HQ Ultralight Whoop Prop 1.2X0.9X4-PC-1MM
2 x CCW HQ Ultralight Whoop Prop 1.2X0.9X4-PC-1MM