ABS closet flange with a hub socket for setting a toilet over an ABS DWV stack — the hub fits over the pipe end and solvent-welds down, anchoring the flange to the finished floor and tying the bowl into the drain. The adjustable plastic ring rotates after the flange is cemented, so you can line the closet bolts up square to the wall before the bowl goes down. It's a LESSO America ABS DWV fitting conforming to ASTM D2661 and CSA B181.1 with NSF/ANSI 14 and cUPC listings — the marks an inspector checks on a residential or light-commercial rough-in across the GTA. The wax or rubber seal and closet bolts are sold separately. DWV service only; test hydrostatically, never with compressed air or gas.