found this
https://www.bestrestproducts.com/p-232-klackstopper-pair-of-2.aspx
anyone seen / heard of this before. we are all told it is the floating disks
https://www.bestrestproducts.com/p-232-klackstopper-pair-of-2.aspx
anyone seen / heard of this before. we are all told it is the floating disks