This is the APC 20X8W Competition RC Plane Propeller

IMAC Aerobatic Wide Blade

Pitch (inches): 8
Propeller Diameter (in.): 20
Hub Diameter: 2.00 in.
Hub Thickness: 0.58 in.
Shaft Diameter: 5/16 in.
Product Weight: 6.81 oz.
Color: GREY