Mercury Bravo Two 3-Blade Aluminum Prop LH 17-1/2 x 23 #48-18619A40 Our Bravo II propellers are big and beefy- just like our Bravo II sterndrive itself. Incredible amounts of blade area for maximum thrust. Complements the massive Bravo II drive Large blade area for increased efficiency. Aluminum 3-Blade, Right or Left hand rotation. Equipped with Flo-Torq I rubber hubs.