Mercury Marine Alpha 4 Blade Aluminum Prop Propeller 14-1/2 x 18 Pitch Part Manufacturer: Mercury; Series: Alpha 4; Part Number: 48-834852A45; UPC: 745061019195 Size: 14 1/2 x 18 Pitch; Rotation: Right Hand; Material: Aluminum; Blades: 4 Measures approximately 4 3/8" across back of hub; Flo-Torq II Hub Assembly Kit is included - part number 835257K1 Sold as seen in pictures; Note every computer shows colors differently; All measurements are approximate; Hardware and instruction/installation manual not included