13x4E Thin Electric Propeller (Reverse) - Black from APC - LPB13040EP
APC propellers are high quality, competition proven propellers without the high quality price tag. Perfect for various prop-driven RC aircraft.

Includes:

One black composite propeller (reverse)
Five composite adapter rings that adapt to different motor shafts

One instruction sheet

Optional:

All propellers should be balanced before use. We recommend using the BenchCraft Precision Propeller Balancer