Based on the stamped part number 48 16316 and 19P, this is a genuine Mercury Marine Vengeance right-hand (standard rotation) 3-blade stainless steel propeller.Technical SpecificationsPart Number: 48-16316 (often listed under superseding part numbers such as 48-16316A46 or 48-8M0151407).Diameter: 14 inches.Pitch: 19P (19-inch pitch).Material: Corrosion-resistant stainless steel, which is up to 5 times more durable than aluminum models and reduces blade flex under heavy loads.Hub Compatibility: Standard 4-3/4" gearcase, typically designed for the Flo-Torq II Interchangeable Hub System.