Kit includes locking prop nut, 1.5 in. washer, 1.5 in. cupped belleville washer & 1 13/16 in. spacer. For use with HD (Heavy Duty) 1.25" propshaft when installed on Sport Master, Torque Master I and II, Fleet Master and Verado 5.25" gearcase and MerCruiser Bravo One XR or XZ, Sport Master and shorty Sport Master Bravo I XR Sport sterndrives. Tighten propeller nut to 55 lb‑ft (75Nm).