3" Or 4", PVC Flange, Solvent Welds Inside Of 4" Or Over 3" Schedule 40 DWV Pipe, With Test Cap, Test Cap Removes By Tapping On Hammer Icons, Breaks Out In 1 Piece, Built In Catch Teeth Prevents The Test Cap From Falling Down Into The DWV Line, 4 Mounting Slots For Closet Bolts, 4 Countersunk Holes For Secure Attachment To The Floor.