This vibratio dampe are optimized for teh Geeetech A20M. Should also fit for A10, A20, A10M, A20M, A30, A30M, A10T, A20T. The springs are made out of PETG, because the A20M is to heavy for just PLA springs. The socket is printed in PLA. The circle has inner diameter of 24mm. Another one for 12mm is also in the list. This is a remix of "Vibration Isolator v2 - by lazzymonk".