Set-Rite - Toilet Flange Spacer - 3/4" Toilet Flange Spacer 3/4" - Use as Layout Tool for new toilet installation Use on existing toilet flanges to support toilet holddown bolts Works with our Code Approved Extender to raise flange to the correct floor height Designed to Snap-in-Half for Existing Toilet Flanges - 7-1/4" diameter Use on Cast Iron, Lead Bends, PVC & ABS Flanges or Uneven Surfaces