This is an APC Thin Electric Pusher Propeller, 9 x 4.5EP
Features:
- Computer-optimized design gives these props a thinner profile and more "bite" with less noise
- Lightweight molded nylon construction reduces rotating mass for higher output and longer life
- Reinforcing fibers help maintain true, constant pitch at any RPM
- Thin Electric propellers work well with Electric powered Park Flyer-type aircraft
