This is a 8x4E Thin Composite propeller from Advanced Precision Composites.
For use on electric powered aircraft only (not for gas 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 rings

REQUIRES: ALL props require balancing, this is VERY important, use TOPQ5700.
May need prop reamer, use GPMQ5005 (SAE) or FOXQ1520 (metric)

SPECS: Diameter: 8"
Pitch: 4"
Hub inner diameter: 0.25"