This is a Master Airscrew 15x12 Electric Folding Propeller with Spinner from the Windsor Propeller Company.

FEATURES: Offers the advantages of a large propeller disk without the drag of fixed blade props. Thin, undercambered glass-filled nylon blades are mounted on an aluminum hub. For use with 3.0 - 4.5:1 ratio gearboxes. Black glass-filled nylon spinner. Blade tips are paintable for added safety.

INCLUDES: One Electric Folding Propeller with Spinner

SPECS: Diameter: 15" (381mm) Pitch: 12" (305mm) Hub: 2-3/4" (70mm) Mounting Hole: 1/4" (6mm)