The only Code Approved Toilet Flange Extender Kit. It will work on regular, cast iron flanges and also lead bends. If you are remodeling your bathroom and find your toilet flange is too low or broken this is the repair kit for you. If your toilet is leaking from the underneath then you may assume that the wax seal is broken but you will not know if your flange is too low until you remove the toilet. Don't let a plumber throw an extra wax ring in there...it will eventually leak and could cause major damage to your flooring. Get a kit today...just to have on hand...You won't regret it.