Our Set-Rite® Toilet Flange Extension Kits can correct flange elevations ranging from 1/4" to 1-5/8". With additional Set-Rite® Spacers a maximum of2-1/4" in elevation can be achieved. These products can be used with existing PVC, ABS, and Stainless Steel or metal flange rings, as well as cast iron closet flanges. Eliminate leak paths with the only water-tight and air-tight flange extension product on the market.