Arquitex paint plugs are a quick and inexpensive procedure to free the area surrounding the flange holes from being painted, and the washer on the set screw-down settles onto the flange correctly.
Manufactured by polypropylene polymer injection can be reused several times without further cleaning them with any solvent.

The lower wings of the Plugs hold it inside the flange hole and its upper handle allows to remove them immediately after the application of the painting