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