This item is for a 38" length (Chronometric) Rev Clock Cable - of the correct length for Post-War Inter and Manx models with the rev clock drive on the front timing cover and Tele forks. This is a good quality UK sourced cable - but with standard speedo cable covering (i.e. not the original pre-war rubbed sheathed variety, which we also offer).
We also offer a similar cable - Item 1045, but with the rare pre-war rubber sheathed finish, which were occasionally fitted on pre-war type competition bikes fitted with re clocs - Item 1045. Both work just as well, but this is cable is substantially cheaper if you are less concerned about ultimate originality and can also be used on pre-war bikes.