Product Description Scupper Plugs Stainless steel Or BrassIMPA CODE: 232481------232488 For sealing the scupper holes for spilled oil or polluted liquids. Easy to use, insert plug in the drain hole and tighten the handle until a slight resistance is felt, the rubber plug will be place. Rubber parts are made of oil resistant rubber(CR). Eight types are available according to the pipe size. Specify the applicable drain pipe diameter when ordering, referring to the plug application list.