APC 8x4 Thin Electric Propeller (APC08040E)

This is a 8x4E 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.INCLUDES One composite propeller Five composite adapter ringsREQUIREMENTS ALL props require balancing, this is VERY important, use TOPQ5700. May need prop reamer, use GPMQ5005 (SAE) or GPMQ5007 (Metric)SPECIFICATIONS  Diameter: 8" Pitch: 4 Hub inner diameter: 0.25"