This is the 12.5X8.5" Formula One Propeller by Master Airscrew.|
This series was designed for Formula One, Pylon, and Combat flyers.
The blades are narrow and thin for racing.
Glass-filled nylon construction
One Master Airscrew 12.5X8.5" prop
Depending on the engine crankshaft size, the propeller may need to
be reamed to a larger size using GPMQ5005 (SAE) or
Hole Diameter: 3.045"