We use an synthetic oil that contains less protons then electrons, creating negatively charged  molecules. Their electrostatic attraction allows more molecules to occupy the same space filling the voids created by the plating.            FREE SHIPPING
Over the years we experimented with different shapes and cutouts. From a visual standpoint unique shapes and inserts look cool and change the frequency of the vibration, but never eliminate the vibration. But the end result is negligible since vibration travels through solid objects.
The subplatter rides on a synthetic ruby bearing made of corundum which is the second hardest known natural substance. Corundum can be polished to a higher degree then a ball bearing.