OJ 3 Blade Nibral XMP Prop replaces all 13 x 13 and 13 x 14 props. This is a great prop for direct drive boats. In our test, it has out performed the 4 blade on 1 to 1 transmission boats. It has more surface area than the 4 blade prop. FYI -- most 13 x 13 boats do best with the 13 x 11.5 XMP 3 Blade-- Free Shipping on all orders over $100
