This is a 12x6E Thin Composite propeller from Advanced Precision Composites.
For use on Electric powered aircraft only (not for glow engines).
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.
One composite propeller
Five composite adapter rings
ALL props require balancing, this is VERY important, use top flite power point propeller balancer
May need prop reamer, use great planes 4-Step standard prop shaft reamer or great planes precision prop reamer metric
Hub inner diameter: 0.25"