These R series propellers from HQProp are designed for freestyle flying.

Package Includes:

2 x CW HQ Racing Prop R42
2 x CCWHQ Racing Prop R42

Specifications:

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