These are the HQ version of the 40mm 4-blade prop with a 1mm shaft size.
Propeller Diameter : 40mm
Pitch : 1
Blades : 4
Material :Poly Carbonate
Weight : 0.5g
Hub Diameter :6mm
Hub Thickness : 5mm
Shaft : 1mm /shaft 1.5mm
Includes
2 x CW HQ Micro Whoop Prop 40MMX4 Grey
2 x CCW HQ Micro Whoop Prop 40MMX4 Grey