This is an APC 10x3.8 Slow Flyer Pusher Propeller. This prop is for electric use only, do not use with gas applications.
This is a "Pusher" reverse rotation prop.
Hub Diameter: 0.50 in.
Hub Thickness: 0.31 in.
Shaft Diameter: 1/4 in.
Product Weight: 0.42 oz.
This product is expected to arrive on Monday, March 16 2020