Cobolt expandable scupper plugs are used for sealing scupper holes for spilled oil or polluted liquids. The plugs are inserted into the drain holes and tightened the handle until a slight resistant is felt. The rubber parts are made of oil resistant rubber. Seven sizes are available.

• High quality brass/bronze casting.

• Expanding sleeves are of NBR oil resistant rubber component are machined to form leak proof seal when expanded against a pipe.

• Size are in conformity with standard ISSA codes.