Ender 3 Pro spring based damper foot

These are spring based vibration damper feet for the Ender 3 Pro (I think, that they should be compatible to the Ender 3, as well).

The larger case part is the lower part in which you have to place 2 springs. Into that lower part you have to place the top part onto which you can then place the rubber foot of the Ender 3 Pro. The installation of all four feet is quite challenging, but it can be done.
You might want to install additional rubber feet below those dampers. My Ender 3 Pro sits on