This is an 11x8E 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.
May need prop reamer
Diameter: 11" (279mm)
Hub inner diameter: 0.25" (6.3mm)
E-flite Nose Gear Arm & Mounting Strap: Apprentice S 15e RTF EFL310009 is compatible...