Set-Rite - Toilet Flange Extender Only Toilet Flange Extender ONLY - Use with Set-Rite Gasket or Standard Wax Ring Code Approved - Provides a Water & Gas Tight Seal (IAPMO) Works Spacers on existing toilet flanges to raise them to the correct floor height Our Extender & Spacers measure 7-1/4" in diameter, just slightly larger than a 7" flange. Use on Cast Iron, Lead Bends, PVC & ABS Flanges or Uneven Surfaces