This is the Graupner 32mm Spinner|
for Cam Folding Propeller Blades with 8mm thick blade roots.
Plastic construction, white in color
Fits motors with 4mm output shafts
Spinner with Taper Collet, Backplate, Blade Socket, Nut, Washer
Spinner Diameter: 1.25" (32mm)
For use with electric motors and folding propellers only.