This listing is for one replacement Servis Rhino / Alamo gearbox output shaft code 00770728. Used on many Servis Rhino / Alamo gearboxes. Threaded on the top for tgear mounting nut, threaded on the bottom for blade carrier mounting nut. See position 8 in the exploded view diagram. Fits gearboxes from the following mowers: S10M, SR15M, SR14, SR20, SR162, SR164 TW96, TW120, TW144, TW168 CY60, CY72 GR60, GR72