HQ R42 Racing Props (Set of 4)

Racers asked for slightly stiffer and faster version of the popular HQ 5.1x4.1x3 and this his is the answer from HQ! This prop was designed with only one thing, RACING!

Specs:

Propeller Diameter: 5.1 inch       
Pitch: 4.2               
Blades: 3
Material: Poly Carbonate        
Weight: 4.9g
Hub Diameter: 13mm           
Hub Thickness: 7mm           
Shaft: 5mm（POPO Compatible)