Oatey 42753 Sink and Drain Equipment, 9"" x 9"", White 5 1/4"" x 5 1/4"" FLAT ALUMINUM GRATE Fits at the bottom of floor sink Acts as a bottom strainer 1-1/2-Inch or 2, 6-Inch x 6-Inch Bell Trap Drain  Fits over 1 1/2-Inch Sch. 40 DWV pipe or into 2-Inch coupling 3-Inch or 4-Inch, 9-Inch x 9-Inch Bell Trap Drain  Fits over 3-Inch or inside of 4-Inch Sch. 40 DWV pipe