You are buying a brand-new UK Made Triumph CEI Alternator Rotor nut. You will get the one rotor nut as pictured. This is an excellent quality rotor nut that is ready to be installed. Features a CEI thread pitch of 26 and measures 7/16″. Fits all Triumph Unit 650 models (Bonneville, Tiger, Trophy, T120, T120C, T120RV, TR6C, TR6RV & TR6CV) from 1963-1972 with a thread pitch of 26 on your crankshaft threads. Also fits various pre-unit twins. Please refer to your parts catalog for proper fitment.Made in the UKO.E.M Part number is 70-3977