http://www.set-rite.com Set-Rite Products Reviews
Excellent Review

This product is a 'must have' when you're installing a new floor in your bathroom. It raised the level of my flange and I was also able to fix my out-of level problem. A well thought out and quality product that was easy to use. If your installing over an old cast iron flange make sure you pre-drill with a 3/16" cobalt bit. It's in the instructions.It was a life-saver.

Set-Rite Products
1 Osborne Terrace
Wayne New Jersey 07470
(973) 694-0014