Designed to connect a water closet outlet to a plumbing system and sit flush with the floor. Oatey 3" or 4" Level-fit closet flanges solvent welds over 3" Sch. 40 DWV pipe or inside 4" Sch. 40 DWV pipe. Corrosion-resistant stainless steelring. Meets ASTM D2661 (ABS) & D2665 (PVC). Adjustable ring for alignment of bolts and screws. Sits flush on the floor.