About a year ago I purchased the blue and the natural cork color (different materials) from the same company that is in the opening post. They do work well, the company also offers a variety of sizes, for example, I have one that's 18" x 18" etc.
One word of caution seems like all of these types of isolation devices (rubber/cork/rubber) will leave black marks on your wooden platforms, that I have nor figured out how to remove.
One word of caution seems like all of these types of isolation devices (rubber/cork/rubber) will leave black marks on your wooden platforms, that I have nor figured out how to remove.