Oatey 43500 Flange Nuts, 3 4-Inch, Black The metal ring provides added strength and cracking resistance to the flange and can be rotated to allow precise alignment of bolts and screws Solvent welds inside of 4 inch or over 3 inch schedule 40 dwv pipe 2 inch offset allows a margin of error for drain pipe/flange alignment Offers protection against tub damage during home construction A semi-flexible, heavy, high-impact Plastic with deep-fluted sidewalls Includes a non-skid foam pad to absorb shock and prevent scratched and dented tub finish Nests for space-saving storage