"The SOLAS Evinrude Type E 90-300hp Fixed Hub Propeller Hardware Kit sets you up to install a new boat propellor (not included) on your Evinrude Type E boat motor (not included). This kit is specifically built for SOLAS Dual Prop and B3 installations, and front and rear propellers must both be manufactured by SOLAS. Also, they must be made of the same material: either aluminum or stainless steel but not both. Special tools may be required. 15-tooth spline, 4.75"" gearcase. Kit includes 2 castle nuts, 2 thrust washers, 2 spacer pins, and 2 cotter pins. Kit sets you up to install a new boat propellor Built for Evinrude Type E 90-300hp installations Includes 2 castle nuts, 2 thrust washers, 2 spacer pins, and 2 cotter pins"