Oatey 43509 Flange Nuts, 3-Inch, White The product is manufactured in China The product is highly durable and easy to use Easy installation and easy handling 3-Inch or 4-Inch all Plastic flange solvent welds inside of 4-Inch or over 3-Inch Schedule 40 DWV pipe 3-Inch inside fit flange fits inside 3-Inch Schedule 40 DWV pipe Four mounting slots Four countersunk holes for secure attachment to the floor