This is an APC 6 x 4EP Speed 400 Composite Electric Pusher Propeller. APC propellers are CAD-designed and manufactured to be lighter, stronger and produce less noise and more power than typical propellers.
This is a Windsor Master Airscrew 13 x 6 3-Blade Propeller. Windsor Propeller Company has been making high-quality Master Airscrew propellers since 1978. Computerdesigned and produced with advanced cad/cam machine tools.
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