This is a new suspension spring for a Hermle or Kieninger grandfather clock movement. Measures approximately 11/16 inch long x 5/16 inch wide (17.5mm long x 8.0mm wide). This spring will work on most Hermle, Kieninger or Morbier Grandmother and wall clocks or smaller movement clocks. These movements are commonly found in Howard Miller, Ridgeway, Sligh, Emporer, Pearl, and Trend grandfather clocks.