Used, according to my research, on Triumph 500 machines from '67-'74, and 650 machines from '69-'70. Please be sure this is what you need (there are FOUR that Triumph/BSA used over the years), to be sure it will work for you. Look in the store or the website, we have them all.
Stainless steel construction, unlike most others on the market. No rust, no corrosion, no worries.