This is a pack of silentBlocks designed to reduce the noise produced by your printer.
I've printed it on ABS and it holds perfectly my Prusa i3.
One thing is to hold the printer on the chasis side (at least on each side).
The other thing is meant to hold the printer on the lower threaded rod, both frontside and backside (two each rod).
More pieces can be used to bear more weight, it depends on your printer mass, but I really encourage you to edit the source FreeCAD file and increase the loop thickness as needed.

Edit FreeCAD file to fit your requirements, increase LOOP thickness to make it harder and to support more weight.
Export model as STL
Load STL model with your favorite slicer and print.
Press Rod pieces to fit in place, Chasis pieces fits without pressure.
Enjoy the silence!