Check the listing for details. OATEY 42742 Cleanout Plug,2 1/2",Brass 3NWD3. Condition: New. Listed at 14.27 USD. Pipe Plug, 2 1/2 in Nominal Pipe Size, Brass, MNPT, 2 1/2 in Outside Diameter, Not Applicable Maximum Operating Pressure, Plug Drive Style Recessed Square.