It fits over 3 in. or inside 4 in. The flange includes two radial slots for closet bolts. Stainless steel ring Flange is constructed of ABS ABS will not rust or corrode 2 in. offset For residential and commercial applications 4-1/4 in. height Black finish Exclusive 400 grade stainless with plumbfit bodies 6 screw holes for securing to the floor Without knockout For water closet (toilet) applications Fits over 3 in. or inside 4 in. schedule 40 DWV pipe 2 radial slots for closet bolts 7 in. overall O.D.