Winged wheel for Motor / Generator

For experiments on the subject of motor - generator, also as a sub-area of alternative energies, to visualize the rotary motion of a motor shaft;
Impeller, attachable to 2 mm motor axles
Material: Plastic
Dimensions: D=70 mm, H=20 mm
Mass: 2 g

additionally recommended:
P3610-1M MBC motor/generator, SE