4" x 3", DWV Schedule 40 Pop Top Closet Flange With Knock Out, Hub Connection, Solvent Welds 3" Schedule 40 Pipe Inside The Fitting Hub.
4" Sewer x 3" DWV Schedule 40 IPS Pipe, Sewer Pipe Adapter Coupling (Hub x Hub), Adapts Schedule 40 IPS Pipe to 4" Sewer Pipe (400 Series).