Norton OHV valve springs, set of 4 ( 2 inner + 2 outer). Suits OHV models 1930 - 1959. Length large spring 53mm Diam 42mm; length small spring 56mm Diam 33mm Original part number: 3076; A3/145; C3/145; E5712; 14398 - valve spring inner 3077; A3/146; C3/146; E6775; 14397 - valve spring outer
