Sioux Chief 886 series Push-Tite closet flange. Flange ring have sufficient holes for securing to floor and optional notches or slots for inserting closet bolts. Flange throat is at least 3" in diameter and have smooth inner walls with no obstructions or ledges to provide full/spherical flow and clog resistance. Engineered elastomer flange gasket have 3 points of contact to ensure a positive seal inside any 4" nominal DWV piping.