This is a 9×7.5E Thin Composite propeller from Advanced Precision Composites.
For use on Electric powered aircraft only (not for glow engines).
FEATURES
Gray composite propeller blades that assemble onto a propeller hub.
Comes with five adapter rings that adapt to different motor shafts.
Comes in a bag attached to a header card.
SPECIFICATIONS
Diameter: 9″ (229mm)
Pitch: 7.5
Hub inner diameter: 0.25″ (605mm)