It fits most models with straight shafts. Fits the following models: Stihl FS55R, FS 56R, FS36, Sarlo SS-18, FS81, FS 80, FS 81, FS 85, FS90, FS 100, FS 110, FS120, FS200, FS250, and others. - Thrust washer: 4130-713-1600, drive plate: 4126-713-3100, collar nut: 4126-642-7600.
