This is a brand new unused hermle suspension spring for hermle grandfather clock movements, it is 1/2inW x 1inL and from pin to hole it is 19/32in . If you have an older movement some of them had plastic or brass parts. This is a more high quality steel spring it is an exact match for what is in your hermle movement guaranteed!I have a 30 day return policy, if u have a problem ship it back i will refund your money. I am a fourth gerneration clockmaker, my family has been restoring clocks in America since 1904. I specialize in repairing clocks back to their prestine quality! If you need something repaired send me a message, I can repair any clock!