As fitted to :-
Norton - Singles/Twins (1965 onwards) pear nipple,
Norton Electra ES400 (1963-1965) pear nipple,
Norton 650S/S 650/99 (1966) pear nipple,
Norton Atlas/N15CS (1965 onwards) pear nipple,
Norton P11/P11A (1967-1968) pear nipple
Outer length: 35"
OEM: NM24987,01-3615