IPS 86181 3-Inch x 4-Inch PVC Offset Closet Flange with Metal Ring Full 3" flow allows for a clog-free drainage opening Stainless steel adjustable ring allows for easy alignment of bolts and screws 1.5" offset allows for margin of error for pipe flange alignment Fits 3" or 4" PVC and ABS DWV pipe Complies with ASTM D2665 or D2661 UPC listed