Set-Rite eliminates improper double stacking of wax with spacers to raise the height and a gasket to seal the system. Set-Rite Toilet Flange Extension Kits can correct flange elevations ranging from 1/4 In. to 1-5/8 In. With additional Set-Rite Spacers, a maximum of 2-1/4 In. 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. Includes extender, 1/8, 1/4, 1/2 & 3/4 In. spacers, gasket, 3-1/2 In. self-tapping screws.