What does this impellar go to?

Ive got this impellar not really sure what it goes to if it won't work for my 750 i have no use for it. so it will be put up for sale. the pitch says 4 7v
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Foximus

CFL Cheapass.
Location
Oviedo, Fl
since there are no splines in the nose its either for a 440 or a yamaha.... . Get a measurement of the bottom outside edges. Diameter...


I'm not sure if the old yamaha styles used the 4 prong nose tool?
 
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