Pricedrop $9 shipped to US
to clarify
Graupner 325P is a P series 32.5mm prop with M4 thread
Graupner 535P is a P series 53.5mm prop with M4 thread
These are glass-fiber reinforced polyamid props with a 1.2 pitch.
The Octura X430 s are, as far as I know, carbon reinforced plastic, similar to the Graupner K series props.
Pitch is 1.4, diameter 30mm, very efficient. These are great to experiment with before actually commiting to cutting and sharpening an expensive berilium octura. Apart from the fact that with these small diameters, difference betweeen berrilium and plastic is not that great because the flex differences is smaller for the smaller props