621 MASTERTORQ FAT SHAFT HUB KIT

For Use With Hustler LE/ LE-4 Series Aluminum Propeller And Express Mach3® EX/ EX-4 Series Stainless Steel Propeller; Outboard; 19 Spline; 5-1/4 Inch To 5.44 Inch Gear Size; For Mercury® And Mercruiser® Applications; Fits Based on Horsepower Please See The Technical Document For More Information