A Timesavers Exclusive!! Finally an alternative to Ni-Span C suspension springs. Nivarox temperature compensating material is the material used by the original German manufacturer (OEM) in their production of complete 400-day clock suspension units. Now you can replace suspension springs with original factory material. 3 springs in a pack. .030mmT x .60mmW x 160mmL (.00118"T x .236"W x 6.30"L)