Seachoice 28701 3-Blade Aluminum Propeller is an excellent performance and value in a replacement propeller for most stern drives and outboards (90hp - 350hp / 4.75" Gear case). Made with a special low-copper alloy for excellent toughness and corrosion resistance. Die-case contrucion allows for uniform blade positioning and durable powder coating contributes to a smoother, longer lasting product. Excellent performance and value in a replacement propellerAvailable for most stern drives and outboardsSpecial low-copper alloy for excellent toughness and corrosion resistanceUniform blade positioning due to die-cast constructionDurable powder coating contributes to a smoother, longer lasting product90hp - 350hp / 4.75" Gear case