For durability and strength, it uses high-quality aluminum alloy. Always make sure of the pitch to match this propeller. It is the ideal aluminum replacement boat prop. It has a non thru hub exhaust style propeller. It's a perfect fit for Chrysler, Force, U.S Marine three-blade aluminum props 75-140hp (one piece lower unit). Key Features: Diameter: 13.125 inches It has accurately balanced blades Dimensions: 17x17x9 inches Non-thru hub exhaust and 15 spline Hub kit: not required, rubber pressed in a hub The most advised boat applications: Family Cruisers, Workboats, Inflatables, Aluminum Consoles, Pontoons, Ski boats, Walleye Boats, and Offshore Singles Specifications: SKU: 072055 Pitch: inches Weight: 9.68 LBS Material: Aluminum UPC:014984003216 Number of Blades: 3 Rotation: Right Hand (RH) Make: Force boat propellers Manufacturer: Michigan Wheel Dimensions: 17x17x9 inches Non-thru hub exhaust and 15 spline OEM Part Number: PR-278, FPS519 Splines: Rubber hub bushing 15 spline Engine type: U.S. Marine, Chrysler, Force Hub kit: not required, rubber pressed in a hub