Michigan Wheel Propellers 201117 V4 13.25 X 17 3 Blade Aluminum Yamaha Made by Michigan Wheel Propellers Manufacturer: Michigan Wheel; Model: Twister; Manufacturer Number: 201117 Material: Black Powder Coated Aluminum; Overall Dimensions: 13 1/4" x 17 Pitch High-Performance CAD designed aluminum blade geometry. Low drag black powder coated aluminum propeller. Equipped with 15-splined hub assembly. The highest-grade metals are used on Michigan Match propellers - high quality aluminum. The tighter grain and compact molecular structure of the metal in Michigan Match props make them far less brittle, far less likely to break. Sold as seen in pictures; Note every computer shows colors differently; All measurements are approximate; Hardware and instruction/installation manual not included.