Raises low toilet flange. Kit includes: Yellow extender, 4 red spacers (1/8", 1/4", 1/2", and 3/4"), watertight/gastight gasket, and 6 stainless steel self drilling screws. Easy to follow directions in English, French, and Spanish. Works on any type of flange: ABS (Acrylonitrile Butadiene Styrene), PVC (polyvinyl chloride), lead, cast iron, broken, or deteriorated. IAPMO (International Association of Plumbing and Mechanical Officials) Certified. CSA (Canadian Standards Association) Approved, UPC (Uniform Plumbing Code) Approved.