This TKO 3 inch hub/inside 4 inch, flush to floor
- Closet Flange
- 3 inch hub or 4 inch inside connection
- Knockout will not break apart / cannot fall down drain pipe
- Strong, corrosion-resistant stainless steel ring eliminates cracked flanges
- Holds five floors (22 PSI) for head test
- Easier installation, no need to hold knockout while hammering