Upgrade your Mercury vessel with this genuine NOS prop shaft, featuring 10 and 20 splines and measuring a length of 11 inches. Designed to provide a seamless fit for your engine, this prop shaft ensures optimal performance and durability, reflecting Mercury's commitment to quality and craftsmanship. Proudly manufactured in the United States, this replacement part is a testament to the brand's dedication to superior boating products. Whether you're conducting routine maintenance or addressing specific performance needs, this prop shaft is an essential component to keep your Mercury engine running smoothly.