English Made Triumph Singles & Twins Zener Diode Heat Sink Bracket Plug. Thought this part couldn’t be replaced? Think again! Simply install this on the end of your Heat Sink and off you go! Fits Triumph 650 Unit Twins (Bonneville, T120R, Tiger, TR6, Etc) up to 1970. Fits Triumph 350 & 500 Unit Twins (Daytona, T100R, T100T, Tiger, T90, Etc) up to 1974. Also fits various Triumph Triples & Unit Singles up to 1970. Please refer to your parts catalog for proper fitment.*****Please note that this part may fit other years and models that are not listed abouve! Check your parts book!*****Made in EnglandO.E.M Part number is 97-2275 or H2275